mute failing search template test (#42730)

tracking issue #42664.

modules/lang-mustache/src/test/resources/rest-api-spec/test/lang_mustache/30_search_template.yml

@@ -128,6 +128,11 @@
 
 ---
 "Test with new response format":
+
+  - skip:
+      version: "all"
+      reason: "AwaitsFix https://github.com/elastic/elasticsearch/issues/42664"
+
   - do:
       index:
         index:  test