Merge branch...

Merge branch '393856-unable-to-create-pipeline-with-frontend-and-feature-flag-labels-in-gitlab-org-gitlab-project' into 'master'

ci: Run 'retrieve-tests-metadata' when 'feature flag' + 'frontend' set

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/113490



Merged-by: Jennifer Li <jli@gitlab.com>
Approved-by: Nao Hashizume <nhashizume@gitlab.com>
Approved-by: Jennifer Li <jli@gitlab.com>
Co-authored-by: Rémy Coutable <remy@rymai.me>