Merge branch '440639-update-group-approval-rules-api-endpoint' into 'master'

Refactor group approval rule api tests

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/144926



Merged-by: Terri Chu <tchu@gitlab.com>
Approved-by: Terri Chu <tchu@gitlab.com>
Approved-by: Gavin Hinfey <ghinfey@gitlab.com>
Co-authored-by: j.seto <jseto@gitlab.com>