Deprecate search:includeFrozen parameter (#114578)

docs/management/advanced-options.asciidoc

@@ -426,6 +426,7 @@ because requests can be spread across all shard copies. However, results might
 be inconsistent because different shards might be in different refresh states.
 
 [[search-includefrozen]]`search:includeFrozen`::
+**This setting is deprecated and will not be supported as of 9.0.**
 Includes {ref}/frozen-indices.html[frozen indices] in results. Searching through
 frozen indices might increase the search time. This setting is off by default.
 Users must opt-in to include frozen indices.

src/plugins/data/server/ui_settings.ts

@@ -269,6 +269,12 @@ export function getUiSettings(): Record<string, UiSettingsParams<unknown>> {
         target="_blank" rel="noopener">frozen indices</a> in results if enabled. Searching through frozen indices
         might increase the search time.`,
       value: false,
+      deprecation: {
+        message: i18n.translate('data.advancedSettings.search.includeFrozenTextDeprecation', {
+          defaultMessage: 'This setting is deprecated and will be removed in Kibana 9.0.',
+        }),
+        docLinksKey: 'kibanaSearchSettings',
+      },
       category: ['search'],
       schema: schema.boolean(),
     },