[Infra] API tests deployment agnostic (#198257)

closes [#198015](#198015)

## Summary

Migrate most of the infra APIs integration tests to the
deployment-agnostic approach.

>[!important]
> - Metrics UI related tests were note migrated because the feature is
not enabled on serverless.
> - `Host with active alerts` test was not migrated because
`es_archiver` fails to load the alerts data. This is because on
serverless, the alerts indices are created as managed data streams and
that causes the `es_archiver` to fail. We should probably try use
synthtrace.

 - [x] Tested against MKI
 - [x] Tested against stateful

---------

Co-authored-by: kibanamachine <[email protected]>
Co-authored-by: Elastic Machine <[email protected]>

.github/CODEOWNERS

@@ -1023,7 +1023,7 @@ packages/kbn-zod-helpers @elastic/security-detection-rule-management
 # The #CC# prefix delineates Code Coverage,
 # used for the 'team' designator within Kibana Stats
 
-/x-pack/test/api_integration/apis/metrics_ui @elastic/obs-ux-logs-team @elastic/obs-ux-infra_services-team
+/x-pack/test/api_integration/apis/metrics_ui @elastic/obs-ux-infra_services-team
 x-pack/test_serverless/api_integration/test_suites/common/platform_security @elastic/kibana-security
 
 # Observability Entities Team (@elastic/obs-entities)
@@ -1157,7 +1157,7 @@ x-pack/test/observability_ai_assistant_api_integration @elastic/obs-ai-assistant
 x-pack/test/observability_ai_assistant_functional @elastic/obs-ai-assistant
 x-pack/test_serverless/**/test_suites/observability/ai_assistant @elastic/obs-ai-assistant
 
-# Infra Monitoring
+# Infra Obs
 ## This plugin mostly contains the codebase for the infra services, but also includes some code for the Logs UI app.
 ## To keep @elastic/obs-ux-logs-team as codeowner of the plugin manifest without requiring a review for all the other code changes
 ## the priority on codeownership will be as follow:
@@ -1188,6 +1188,7 @@ x-pack/test_serverless/**/test_suites/observability/ai_assistant @elastic/obs-ai
 /x-pack/plugins/observability_solution/infra/server/services @elastic/obs-ux-infra_services-team
 /x-pack/plugins/observability_solution/infra/server/usage @elastic/obs-ux-infra_services-team
 /x-pack/plugins/observability_solution/infra/server/utils @elastic/obs-ux-infra_services-team
+/x-pack/test/api_integration/deployment_agnostic/apis/observability/infra @elastic/obs-ux-logs-team
 
 ## Logs UI code exceptions -> @elastic/obs-ux-logs-team
 /x-pack/test_serverless/functional/page_objects/svl_oblt_onboarding_stream_log_file.ts @elastic/obs-ux-logs-team

packages/kbn-apm-synthtrace/src/lib/apm/client/apm_synthtrace_kibana_client.ts

@@ -16,10 +16,12 @@ import { getFetchAgent } from '../../../cli/utils/ssl';
 export class ApmSynthtraceKibanaClient {
   private readonly logger: Logger;
   private target: string;
+  private headers: Record<string, string>;
 
-  constructor(options: { logger: Logger; target: string }) {
+  constructor(options: { logger: Logger; target: string; headers?: Record<string, string> }) {
     this.logger = options.logger;
     this.target = options.target;
+    this.headers = { ...kibanaHeaders(), ...(options.headers ?? {}) };
   }
 
   getFleetApmPackagePath(packageVersion?: string): string {
@@ -39,7 +41,7 @@ export class ApmSynthtraceKibanaClient {
 
       const response = await fetch(url, {
         method: 'GET',
-        headers: kibanaHeaders(),
+        headers: this.headers,
         agent: getFetchAgent(url),
       });
 
@@ -79,7 +81,7 @@ export class ApmSynthtraceKibanaClient {
       async () => {
         const res = await fetch(url, {
           method: 'POST',
-          headers: kibanaHeaders(),
+          headers: this.headers,
           body: '{"force":true}',
           agent: getFetchAgent(url),
         });
@@ -127,7 +129,7 @@ export class ApmSynthtraceKibanaClient {
       async () => {
         const res = await fetch(url, {
           method: 'DELETE',
-          headers: kibanaHeaders(),
+          headers: this.headers,
           body: '{"force":true}',
           agent: getFetchAgent(url),
         });

x-pack/test/api_integration/apis/logs_ui/index.ts

@@ -11,5 +11,8 @@ export default function ({ loadTestFile }: FtrProviderContext) {
   describe('Logs UI routes', () => {
     loadTestFile(require.resolve('./log_views'));
     loadTestFile(require.resolve('./log_threshold_alert'));
+    loadTestFile(require.resolve('./log_entry_highlights'));
+    loadTestFile(require.resolve('./log_summary'));
+    loadTestFile(require.resolve('./log_analysis_validation_log_entry_datasets'));
   });
 }

x-pack/test/api_integration/apis/logs_ui/log_threshold_alert.ts

@@ -18,7 +18,7 @@ import {
   RatioCriteria,
   RuleParams,
 } from '@kbn/infra-plugin/common/alerting/logs/log_threshold/types';
-import { DATES } from '../metrics_ui/constants';
+import { DATES } from './utils/constants';
 import { FtrProviderContext } from '../../ftr_provider_context';
 
 export default function ({ getService }: FtrProviderContext) {

x-pack/test/api_integration/apis/logs_ui/utils/constants.ts

@@ -0,0 +1,24 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+
+export const DATES = {
+  'alert-test-data': {
+    gauge: {
+      min: 1609459200000, // '2022-01-01T00:00:00Z'
+      max: 1609462800000, // '2021-01-01T01:00:00Z',
+      midpoint: 1609461000000, // '2021-01-01T00:30:00Z'
+    },
+    rate: {
+      min: 1609545600000, // '2021-01-02T00:00:00Z'
+      max: 1609545900000, // '2021-01-02T00:05:00Z'
+    },
+  },
+  ten_thousand_plus: {
+    min: 1634604480001, // 2021-10-19T00:48:00.001Z
+    max: 1634604839997, // 2021-10-19T00:53:59.997Z
+  },
+};

x-pack/test/api_integration/apis/metrics_ui/index.ts

@@ -0,0 +1,15 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+
+import type { FtrProviderContext } from '../../ftr_provider_context';
+
+export default function ({ loadTestFile }: FtrProviderContext) {
+  describe('MetricsUI Endpoints', () => {
+    loadTestFile(require.resolve('./metrics_explorer'));
+    loadTestFile(require.resolve('./metric_threshold_alert'));
+  });
+}