Add availability for new mode param (#5276)

* Add availability for new mode param

* drop the default

* contrib part too

* Run make contrib

---------

Co-authored-by: Quentin Pradet <[email protected]>

Author: smalyshev

output/openapi/elasticsearch-openapi.json

@@ -67,6 +67,8 @@ export interface Request extends RequestBase {
     allow_no_indices?: boolean
     /**
      * Filter indices by index mode - standard, lookup, time_series, etc. Comma-separated list of IndexMode. Empty means no filter.
+     * @availability stack since=9.2.0 stability=stable
+     * @availability serverless stability=stable visibility=public
      */
     mode?: IndexMode | IndexMode[]
   }