[Backport 3.0] Enabled Async Shard Batch Fetch by default (#18139)#18162

gargmanik13 wants to merge 1 commit intoopensearch-project:3.0opensearch-project/OpenSearch:3.0from

gargmanik13:backport/backport-18139-to-3.0gargmanik13/OpenSearch:backport/backport-18139-to-3.0Copy head branch name to clipboard