Merge branch...

Merge branch '466252-mention-automatic-anchors-for-tag-cleanup-policies-regex-fields-in-the-ui' into 'master' 

Adds info alert about cleanup policy regexp anchors

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/157888



Merged-by: Stanislav Lashmanov <slashmanov@gitlab.com>
Approved-by: Diana Zubova <dzubova@gitlab.com>
Approved-by: Stanislav Lashmanov <slashmanov@gitlab.com>
Reviewed-by: Diana Zubova <dzubova@gitlab.com>
Reviewed-by: Rahul Chanila <rchanila@gitlab.com>
Co-authored-by: Rahul Chanila <rchanila@gitlab.com>