[7.7] Rename async search params (#61641) (#61917)

* Rename async search params (#61641)

Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>

* Remove polling delay

* Fix merge issue

Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>
Co-authored-by: Liza Katz <lizka.k@gmail.com>

x-pack/plugins/data_enhanced/server/search/es_search_strategy.ts

@@ -69,7 +69,7 @@ async function asyncSearch(
   const path = encodeURI(request.id ? `_async_search/${request.id}` : `${index}/_async_search`);
 
   // Wait up to 1s for the response to return
-  const query = toSnakeCase({ /* waitForCompletion: '1s', */ ...queryParams });
+  const query = toSnakeCase({ waitForCompletionTimeout: '1s', ...queryParams });
 
   const { response, id } = (await caller(
     'transport.request',