[8.17] [SLOs] Added $state into filters schema !! (#202887) (#203056)

# Backport

This will backport the following commits from `main` to `8.17`:
- [[SLOs] Added $state into filters schema !!
(#202887)](#202887)

<!--- Backport version: 9.4.3 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sqren/backport)

<!--BACKPORT
[{"author":{"name":"Shahzad","email":"[email protected]"},"sourceCommit":{"committedDate":"2024-12-05T09:12:48Z","message":"[SLOs]
Added $state into filters schema !! (#202887)\n\n## Summary\r\n\r\nfixes
https://github.com/elastic/kibana/issues/202999\r\n\r\nAdded $state into
filters schema
!!","sha":"51e63eeaccd9998d473ef62d11d530697a836e7f","branchLabelMapping":{"^v9.0.0$":"main","^v8.18.0$":"8.x","^v(\\d+).(\\d+).\\d+$":"$1.$2"}},"sourcePullRequest":{"labels":["release_note:skip","v9.0.0","backport:prev-major"],"title":"[SLOs]
Added $state into filters schema
!!","number":202887,"url":"https://github.com/elastic/kibana/pull/202887","mergeCommit":{"message":"[SLOs]
Added $state into filters schema !! (#202887)\n\n## Summary\r\n\r\nfixes
https://github.com/elastic/kibana/issues/202999\r\n\r\nAdded $state into
filters schema
!!","sha":"51e63eeaccd9998d473ef62d11d530697a836e7f"}},"sourceBranch":"main","suggestedTargetBranches":[],"targetPullRequestStates":[{"branch":"main","label":"v9.0.0","branchLabelMappingKey":"^v9.0.0$","isSourceBranch":true,"state":"MERGED","url":"https://github.com/elastic/kibana/pull/202887","number":202887,"mergeCommit":{"message":"[SLOs]
Added $state into filters schema !! (#202887)\n\n## Summary\r\n\r\nfixes
https://github.com/elastic/kibana/issues/202999\r\n\r\nAdded $state into
filters schema !!","sha":"51e63eeaccd9998d473ef62d11d530697a836e7f"}}]}]
BACKPORT-->

Co-authored-by: Shahzad <[email protected]>

x-pack/packages/kbn-slo-schema/src/schema/indicators.ts

@@ -11,26 +11,31 @@ import { allOrAnyString } from './common';
 const kqlQuerySchema = t.string;
 
 const filtersSchema = t.array(
-  t.type({
-    meta: t.partial({
-      alias: t.union([t.string, t.null]),
-      disabled: t.boolean,
-      negate: t.boolean,
-      // controlledBy is there to identify who owns the filter
-      controlledBy: t.string,
-      // allows grouping of filters
-      group: t.string,
-      // index and type are optional only because when you create a new filter, there are no defaults
-      index: t.string,
-      isMultiIndex: t.boolean,
-      type: t.string,
-      key: t.string,
-      field: t.string,
-      params: t.any,
-      value: t.string,
+  t.intersection([
+    t.type({
+      meta: t.partial({
+        alias: t.union([t.string, t.null]),
+        disabled: t.boolean,
+        negate: t.boolean,
+        // controlledBy is there to identify who owns the filter
+        controlledBy: t.string,
+        // allows grouping of filters
+        group: t.string,
+        // index and type are optional only because when you create a new filter, there are no defaults
+        index: t.string,
+        isMultiIndex: t.boolean,
+        type: t.string,
+        key: t.string,
+        field: t.string,
+        params: t.any,
+        value: t.string,
+      }),
+      query: t.record(t.string, t.any),
+    }),
+    t.partial({
+      $state: t.any,
     }),
-    query: t.record(t.string, t.any),
-  })
+  ])
 );
 
 const kqlWithFiltersSchema = t.type({