Merge branch...

Merge branch '457145-disable-ai_review-quick-action-if-there-are-no-diff-files-to-review' into 'master' 

Skip duo code review if there are no files to review

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/159863



Merged-by: Eugenia Grieff <egrieff@gitlab.com>
Approved-by: Amy Qualls <aqualls@gitlab.com>
Approved-by: Patrick Bajao <ebajao@gitlab.com>
Approved-by: Eugenia Grieff <egrieff@gitlab.com>
Reviewed-by: Patrick Bajao <ebajao@gitlab.com>
Reviewed-by: Sincheol (David) Kim <dkim@gitlab.com>
Co-authored-by: David Kim <dkim@gitlab.com>