feat: Support promql field in GCM terraform [PC-14302] (#371)

## Motivation

Support promql field in GCM terraform.

## Summary

Example:
```
  objective {
    display_name = "obj1"
    name         = "tf-objective-1"
    target       = 0.7
    value        = 1
    op           = "lt"
    raw_metric {
      query {
        gcm {
          project_id = "project1"
		  promql = "sum(rate(http_requests_total{job=\"api-server\"}[5m]))"
		}
      }
    }
  }
```


## Related Changes

nobl9/nobl9-go#564


## Release Notes

Support promql field in GCM terraform

docs/resources/slo.md

@@ -306,7 +306,7 @@ Optional:
 - `datadog` (Block Set) [Configuration documentation](https://docs.nobl9.com/Sources/datadog#creating-slos-with-datadog) (see [below for nested schema](#nestedblock--objective--count_metrics--bad--datadog))
 - `dynatrace` (Block Set) [Configuration documentation](https://docs.nobl9.com/Sources/dynatrace#creating-slos-with-dynatrace) (see [below for nested schema](#nestedblock--objective--count_metrics--bad--dynatrace))
 - `elasticsearch` (Block Set) [Configuration documentation](https://docs.nobl9.com/Sources/elasticsearch#creating-slos-with-elasticsearch) (see [below for nested schema](#nestedblock--objective--count_metrics--bad--elasticsearch))
-- `gcm` (Block Set) [Configuration documentation](https://docs.nobl9.com/Sources/google-cloud-monitoring#creating-slos-with-google-cloud-monitoring) (see [below for nested schema](#nestedblock--objective--count_metrics--bad--gcm))
+- `gcm` (Block Set) [Configuration documentation](https://docs.nobl9.com/sources/google-cloud-monitoring/#creating-slos-with-google-cloud-monitoring) (see [below for nested schema](#nestedblock--objective--count_metrics--bad--gcm))
 - `grafana_loki` (Block Set) [Configuration documentation](https://docs.nobl9.com/Sources/grafana-loki#creating-slos-with-grafana-loki) (see [below for nested schema](#nestedblock--objective--count_metrics--bad--grafana_loki))
 - `graphite` (Block Set) [Configuration documentation](https://docs.nobl9.com/Sources/graphite#creating-slos-with-graphite) (see [below for nested schema](#nestedblock--objective--count_metrics--bad--graphite))
 - `honeycomb` (Block Set) [Configuration documentation](https://docs.nobl9.com/Sources/honeycomb#creating-slos-with-honeycomb) (see [below for nested schema](#nestedblock--objective--count_metrics--bad--honeycomb))
@@ -446,7 +446,11 @@ Required:
 Required:
 
 - `project_id` (String) Project ID
-- `query` (String) Query for the metrics
+
+Optional:
+
+- `promql` (String) Query for the metrics in PromQL format
+- `query` (String) Query for the metrics in MQL format ([deprecated](https://cloud.google.com/stackdriver/docs/deprecations/mql))
 
 
 <a id="nestedblock--objective--count_metrics--bad--grafana_loki"></a>
@@ -677,7 +681,7 @@ Optional:
 - `datadog` (Block Set) [Configuration documentation](https://docs.nobl9.com/Sources/datadog#creating-slos-with-datadog) (see [below for nested schema](#nestedblock--objective--count_metrics--good--datadog))
 - `dynatrace` (Block Set) [Configuration documentation](https://docs.nobl9.com/Sources/dynatrace#creating-slos-with-dynatrace) (see [below for nested schema](#nestedblock--objective--count_metrics--good--dynatrace))
 - `elasticsearch` (Block Set) [Configuration documentation](https://docs.nobl9.com/Sources/elasticsearch#creating-slos-with-elasticsearch) (see [below for nested schema](#nestedblock--objective--count_metrics--good--elasticsearch))
-- `gcm` (Block Set) [Configuration documentation](https://docs.nobl9.com/Sources/google-cloud-monitoring#creating-slos-with-google-cloud-monitoring) (see [below for nested schema](#nestedblock--objective--count_metrics--good--gcm))
+- `gcm` (Block Set) [Configuration documentation](https://docs.nobl9.com/sources/google-cloud-monitoring/#creating-slos-with-google-cloud-monitoring) (see [below for nested schema](#nestedblock--objective--count_metrics--good--gcm))
 - `grafana_loki` (Block Set) [Configuration documentation](https://docs.nobl9.com/Sources/grafana-loki#creating-slos-with-grafana-loki) (see [below for nested schema](#nestedblock--objective--count_metrics--good--grafana_loki))
 - `graphite` (Block Set) [Configuration documentation](https://docs.nobl9.com/Sources/graphite#creating-slos-with-graphite) (see [below for nested schema](#nestedblock--objective--count_metrics--good--graphite))
 - `honeycomb` (Block Set) [Configuration documentation](https://docs.nobl9.com/Sources/honeycomb#creating-slos-with-honeycomb) (see [below for nested schema](#nestedblock--objective--count_metrics--good--honeycomb))
@@ -817,7 +821,11 @@ Required:
 Required:
 
 - `project_id` (String) Project ID
-- `query` (String) Query for the metrics
+
+Optional:
+
+- `promql` (String) Query for the metrics in PromQL format
+- `query` (String) Query for the metrics in MQL format ([deprecated](https://cloud.google.com/stackdriver/docs/deprecations/mql))
 
 
 <a id="nestedblock--objective--count_metrics--good--grafana_loki"></a>
@@ -1048,7 +1056,7 @@ Optional:
 - `datadog` (Block Set) [Configuration documentation](https://docs.nobl9.com/Sources/datadog#creating-slos-with-datadog) (see [below for nested schema](#nestedblock--objective--count_metrics--good_total--datadog))
 - `dynatrace` (Block Set) [Configuration documentation](https://docs.nobl9.com/Sources/dynatrace#creating-slos-with-dynatrace) (see [below for nested schema](#nestedblock--objective--count_metrics--good_total--dynatrace))
 - `elasticsearch` (Block Set) [Configuration documentation](https://docs.nobl9.com/Sources/elasticsearch#creating-slos-with-elasticsearch) (see [below for nested schema](#nestedblock--objective--count_metrics--good_total--elasticsearch))
-- `gcm` (Block Set) [Configuration documentation](https://docs.nobl9.com/Sources/google-cloud-monitoring#creating-slos-with-google-cloud-monitoring) (see [below for nested schema](#nestedblock--objective--count_metrics--good_total--gcm))
+- `gcm` (Block Set) [Configuration documentation](https://docs.nobl9.com/sources/google-cloud-monitoring/#creating-slos-with-google-cloud-monitoring) (see [below for nested schema](#nestedblock--objective--count_metrics--good_total--gcm))
 - `grafana_loki` (Block Set) [Configuration documentation](https://docs.nobl9.com/Sources/grafana-loki#creating-slos-with-grafana-loki) (see [below for nested schema](#nestedblock--objective--count_metrics--good_total--grafana_loki))
 - `graphite` (Block Set) [Configuration documentation](https://docs.nobl9.com/Sources/graphite#creating-slos-with-graphite) (see [below for nested schema](#nestedblock--objective--count_metrics--good_total--graphite))
 - `honeycomb` (Block Set) [Configuration documentation](https://docs.nobl9.com/Sources/honeycomb#creating-slos-with-honeycomb) (see [below for nested schema](#nestedblock--objective--count_metrics--good_total--honeycomb))
@@ -1188,7 +1196,11 @@ Required:
 Required:
 
 - `project_id` (String) Project ID
-- `query` (String) Query for the metrics
+
+Optional:
+
+- `promql` (String) Query for the metrics in PromQL format
+- `query` (String) Query for the metrics in MQL format ([deprecated](https://cloud.google.com/stackdriver/docs/deprecations/mql))
 
 
 <a id="nestedblock--objective--count_metrics--good_total--grafana_loki"></a>
@@ -1419,7 +1431,7 @@ Optional:
 - `datadog` (Block Set) [Configuration documentation](https://docs.nobl9.com/Sources/datadog#creating-slos-with-datadog) (see [below for nested schema](#nestedblock--objective--count_metrics--total--datadog))
 - `dynatrace` (Block Set) [Configuration documentation](https://docs.nobl9.com/Sources/dynatrace#creating-slos-with-dynatrace) (see [below for nested schema](#nestedblock--objective--count_metrics--total--dynatrace))
 - `elasticsearch` (Block Set) [Configuration documentation](https://docs.nobl9.com/Sources/elasticsearch#creating-slos-with-elasticsearch) (see [below for nested schema](#nestedblock--objective--count_metrics--total--elasticsearch))
-- `gcm` (Block Set) [Configuration documentation](https://docs.nobl9.com/Sources/google-cloud-monitoring#creating-slos-with-google-cloud-monitoring) (see [below for nested schema](#nestedblock--objective--count_metrics--total--gcm))
+- `gcm` (Block Set) [Configuration documentation](https://docs.nobl9.com/sources/google-cloud-monitoring/#creating-slos-with-google-cloud-monitoring) (see [below for nested schema](#nestedblock--objective--count_metrics--total--gcm))
 - `grafana_loki` (Block Set) [Configuration documentation](https://docs.nobl9.com/Sources/grafana-loki#creating-slos-with-grafana-loki) (see [below for nested schema](#nestedblock--objective--count_metrics--total--grafana_loki))
 - `graphite` (Block Set) [Configuration documentation](https://docs.nobl9.com/Sources/graphite#creating-slos-with-graphite) (see [below for nested schema](#nestedblock--objective--count_metrics--total--graphite))
 - `honeycomb` (Block Set) [Configuration documentation](https://docs.nobl9.com/Sources/honeycomb#creating-slos-with-honeycomb) (see [below for nested schema](#nestedblock--objective--count_metrics--total--honeycomb))
@@ -1559,7 +1571,11 @@ Required:
 Required:
 
 - `project_id` (String) Project ID
-- `query` (String) Query for the metrics
+
+Optional:
+
+- `promql` (String) Query for the metrics in PromQL format
+- `query` (String) Query for the metrics in MQL format ([deprecated](https://cloud.google.com/stackdriver/docs/deprecations/mql))
 
 
 <a id="nestedblock--objective--count_metrics--total--grafana_loki"></a>
@@ -1798,7 +1814,7 @@ Optional:
 - `datadog` (Block Set) [Configuration documentation](https://docs.nobl9.com/Sources/datadog#creating-slos-with-datadog) (see [below for nested schema](#nestedblock--objective--raw_metric--query--datadog))
 - `dynatrace` (Block Set) [Configuration documentation](https://docs.nobl9.com/Sources/dynatrace#creating-slos-with-dynatrace) (see [below for nested schema](#nestedblock--objective--raw_metric--query--dynatrace))
 - `elasticsearch` (Block Set) [Configuration documentation](https://docs.nobl9.com/Sources/elasticsearch#creating-slos-with-elasticsearch) (see [below for nested schema](#nestedblock--objective--raw_metric--query--elasticsearch))
-- `gcm` (Block Set) [Configuration documentation](https://docs.nobl9.com/Sources/google-cloud-monitoring#creating-slos-with-google-cloud-monitoring) (see [below for nested schema](#nestedblock--objective--raw_metric--query--gcm))
+- `gcm` (Block Set) [Configuration documentation](https://docs.nobl9.com/sources/google-cloud-monitoring/#creating-slos-with-google-cloud-monitoring) (see [below for nested schema](#nestedblock--objective--raw_metric--query--gcm))
 - `grafana_loki` (Block Set) [Configuration documentation](https://docs.nobl9.com/Sources/grafana-loki#creating-slos-with-grafana-loki) (see [below for nested schema](#nestedblock--objective--raw_metric--query--grafana_loki))
 - `graphite` (Block Set) [Configuration documentation](https://docs.nobl9.com/Sources/graphite#creating-slos-with-graphite) (see [below for nested schema](#nestedblock--objective--raw_metric--query--graphite))
 - `honeycomb` (Block Set) [Configuration documentation](https://docs.nobl9.com/Sources/honeycomb#creating-slos-with-honeycomb) (see [below for nested schema](#nestedblock--objective--raw_metric--query--honeycomb))
@@ -1938,7 +1954,11 @@ Required:
 Required:
 
 - `project_id` (String) Project ID
-- `query` (String) Query for the metrics
+
+Optional:
+
+- `promql` (String) Query for the metrics in PromQL format
+- `query` (String) Query for the metrics in MQL format ([deprecated](https://cloud.google.com/stackdriver/docs/deprecations/mql))
 
 
 <a id="nestedblock--objective--raw_metric--query--grafana_loki"></a>

nobl9/resource_slo.go

@@ -1664,7 +1664,7 @@ func unmarshalElasticsearchMetric(metric interface{}) map[string]interface{} {
 
 /**
  * Google Cloud Monitoring (GCM) Metric
- * https://docs.nobl9.com/Sources/google-cloud-monitoring#creating-slos-with-google-cloud-monitoring
+ * https://docs.nobl9.com/sources/google-cloud-monitoring/#creating-slos-with-google-cloud-monitoring
  */
 const gcmMetric = "gcm"
 
@@ -1674,7 +1674,7 @@ func schemaMetricGCM() map[string]*schema.Schema {
 			Type:     schema.TypeSet,
 			Optional: true,
 			Description: "[Configuration documentation]" +
-				"(https://docs.nobl9.com/Sources/google-cloud-monitoring#creating-slos-with-google-cloud-monitoring)",
+				"(https://docs.nobl9.com/sources/google-cloud-monitoring/#creating-slos-with-google-cloud-monitoring)",
 			Elem: &schema.Resource{
 				Schema: map[string]*schema.Schema{
 					"project_id": {
@@ -1683,9 +1683,15 @@ func schemaMetricGCM() map[string]*schema.Schema {
 						Description: "Project ID",
 					},
 					"query": {
+						Type:     schema.TypeString,
+						Optional: true,
+						Description: "Query for the metrics in MQL format" +
+							" ([deprecated](https://cloud.google.com/stackdriver/docs/deprecations/mql))",
+					},
+					"promql": {
 						Type:        schema.TypeString,
-						Required:    true,
-						Description: "Query for the metrics",
+						Optional:    true,
+						Description: "Query for the metrics in PromQL format",
 					},
 				},
 			},
@@ -1703,6 +1709,7 @@ func marshalGCMMetric(s *schema.Set) *v1alphaSLO.GCMMetric {
 	return &v1alphaSLO.GCMMetric{
 		ProjectID: metric["project_id"].(string),
 		Query:     metric["query"].(string),
+		PromQL:    metric["promql"].(string),
 	}
 }
 
@@ -1714,6 +1721,7 @@ func unmarshalGCMMetric(metric interface{}) map[string]interface{} {
 	res := make(map[string]interface{})
 	res["project_id"] = gMetric.ProjectID
 	res["query"] = gMetric.Query
+	res["promql"] = gMetric.PromQL
 
 	return res
 }

nobl9/resource_slo_test.go

@@ -33,6 +33,7 @@ func TestAcc_Nobl9SLO(t *testing.T) {
 		{"test-composite-with-value", testCompositeSLOValueZeroBackwardCompatibility},
 		{"test-datadog", testDatadogSLO},
 		{"test-dynatrace", testDynatraceSLO},
+		{"test-google-cloud-monitoring", testGoogleCloudMonitoringPromQLSLO},
 		{"test-grafanaloki", testGrafanaLokiSLO},
 		{"test-graphite", testGraphiteSLO},
 		{"test-honeycomb", testHoneycombSLO},
@@ -1325,6 +1326,67 @@ resource "nobl9_slo" ":name" {
 	return config
 }
 
+func testGoogleCloudMonitoringPromQLSLO(name string) string {
+	var serviceName = name + "-tf-service"
+	var agentName = name + "-tf-agent"
+	config :=
+		testService(serviceName) +
+			testGoogleCloudMonitoringAgent(agentName) + `
+resource "nobl9_slo" ":name" {
+  name         = ":name"
+  display_name = ":name"
+    project      = ":project"
+  service      = nobl9_service.:serviceName.name
+
+  label {
+   key = "team"
+   values = ["green","sapphire"]
+  }
+
+  label {
+   key = "env"
+   values = ["dev", "staging", "prod"]
+  }
+
+  budgeting_method = "Occurrences"
+
+  objective {
+    display_name = "obj1"
+    name         = "tf-objective-1"
+    target       = 0.7
+    value        = 1
+    op           = "lt"
+    raw_metric {
+      query {
+        gcm {
+          project_id = "project1"
+		  promql = "sum(rate(http_requests_total{job=\"api-server\"}[5m]))"
+		}
+      }
+    }
+  }
+
+  time_window {
+    count      = 10
+    is_rolling = true
+    unit       = "Minute"
+  }
+
+  indicator {
+    name    = nobl9_agent.:agentName.name
+    project = ":project"
+      kind    = "Agent"
+  }
+}
+`
+	config = strings.ReplaceAll(config, ":name", name)
+	config = strings.ReplaceAll(config, ":serviceName", serviceName)
+	config = strings.ReplaceAll(config, ":agentName", agentName)
+	config = strings.ReplaceAll(config, ":project", testProject)
+
+	return config
+}
+
 func testGrafanaLokiSLO(name string) string {
 	var serviceName = name + "-tf-service"
 	var agentName = name + "-tf-agent"