[Backport 2.x] Purge remote translog basis the latest metadata for remote-backed indexes#6170

gbbafna merged 2 commits intoopensearch-project:2.xopensearch-project/OpenSearch:2.xfrom

ashking94:backport/backport-6086-to-2.xashking94/OpenSearch:backport/backport-6086-to-2.xCopy head branch name to clipboard