Merge branch '504700-add-logging' into 'master'

Add logging for running policy violations after merge

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/183816



Merged-by: Marc Shaw <mshaw@gitlab.com>
Approved-by: Marc Shaw <mshaw@gitlab.com>
Co-authored-by: Martin Čavoj <mcavoj@gitlab.com>