Set rest spec to stable/public

Author: jbaiera

rest-api-spec/src/main/resources/rest-api-spec/api/indices.delete_data_stream_options.json

@@ -4,9 +4,8 @@
       "url":"https://www.elastic.co/guide/en/elasticsearch/reference/current/index.html",
       "description":"Deletes the data stream options of the selected data streams."
     },
-    "stability": "experimental",
-    "visibility": "feature_flag",
-    "feature_flag": "es.failure_store_feature_flag_enabled",
+    "stability": "stable",
+    "visibility": "public",
     "headers":{
       "accept": [ "application/json"]
     },

rest-api-spec/src/main/resources/rest-api-spec/api/indices.get_data_stream_options.json

@@ -4,9 +4,8 @@
       "url":"https://www.elastic.co/guide/en/elasticsearch/reference/current/index.html",
       "description":"Returns the data stream options of the selected data streams."
     },
-    "stability": "experimental",
-    "visibility": "feature_flag",
-    "feature_flag": "es.failure_store_feature_flag_enabled",
+    "stability": "stable",
+    "visibility": "public",
     "headers":{
       "accept": [ "application/json"]
     },

rest-api-spec/src/main/resources/rest-api-spec/api/indices.put_data_stream_options.json

@@ -4,9 +4,8 @@
       "url":"https://www.elastic.co/guide/en/elasticsearch/reference/current/index.html",
       "description":"Updates the data stream options of the selected data streams."
     },
-    "stability": "experimental",
-    "visibility": "feature_flag",
-    "feature_flag": "es.failure_store_feature_flag_enabled",
+    "stability": "stable",
+    "visibility": "public",
     "headers":{
       "accept": [ "application/json"],
       "content_type": ["application/json"]