[8.18] [DOCS] Add link for cluster settings (#4491) (#4502)

(cherry picked from commit 93cbe0b)

Author: lcawl

output/openapi/elasticsearch-openapi.json

@@ -203,6 +203,7 @@ eql-sequences,https://www.elastic.co/guide/en/elasticsearch/reference/{branch}/e
 eql-missing-events,https://www.elastic.co/guide/en/elasticsearch/reference/{branch}/eql-syntax.html#eql-missing-events
 eql-syntax,https://www.elastic.co/guide/en/elasticsearch/reference/{branch}/eql-syntax.html
 eql,https://www.elastic.co/guide/en/elasticsearch/reference/{branch}/eql.html
+es-settings,https://www.elastic.co/guide/en/elasticsearch/reference/{branch}/settings.html
 esql,https://www.elastic.co/guide/en/elasticsearch/reference/{branch}/esql.html
 esql-async-query,https://www.elastic.co/guide/en/elasticsearch/reference/{branch}/esql-async-query-api.html
 esql-async-query-delete,https://www.elastic.co/guide/en/elasticsearch/reference/{branch}/esql-async-query-delete-api.html

output/schema/schema.json

@@ -28,6 +28,7 @@ import { Duration } from '@_types/Time'
  * @availability serverless stability=stable visibility=private
  * @cluster_privileges monitor
  * @doc_id cluster-get-settings
+ * @ext_doc_id es-settings
  */
 export interface Request extends RequestBase {
   urls: [

specification/_doc_ids/table.csv

@@ -22,8 +22,11 @@ import { UserDefinedValue } from '@spec_utils/UserDefinedValue'
 
 export class Response {
   body: {
+    /** The settings that persist after the cluster restarts. */
     persistent: Dictionary<string, UserDefinedValue>
+    /** The settings that do not persist after the cluster restarts. */
     transient: Dictionary<string, UserDefinedValue>
+    /** The default setting values. */
     defaults?: Dictionary<string, UserDefinedValue>
   }
 }

specification/cluster/get_settings/ClusterGetSettingsRequest.ts

@@ -45,6 +45,7 @@ import { UserDefinedValue } from '@spec_utils/UserDefinedValue'
  * @availability stack stability=stable
  * @availability serverless stability=stable visibility=private
  * @doc_id cluster-update-settings
+ * @ext_doc_id es-settings
  */
 export interface Request extends RequestBase {
   urls: [
@@ -61,7 +62,9 @@ export interface Request extends RequestBase {
     timeout?: Duration
   }
   body: {
+    /** The settings that persist after the cluster restarts. */
     persistent?: Dictionary<string, UserDefinedValue>
+    /** The settings that do not persist after the cluster restarts. */
     transient?: Dictionary<string, UserDefinedValue>
   }
 }