[8.x] Avoiding a race condition where pending indices count is 0 at start of data stream reindex (#123765)#123772

elasticsearchmachine merged 1 commit intoelastic:8.xelastic/elasticsearch:8.xfrom

masseyke:backport/8.x/pr-123765masseyke/elasticsearch:backport/8.x/pr-123765Copy head branch name to clipboard