Merge branch '273375-broken-master-due-to-rspec-feature-flags' into 'master'

[RUN ALL RSPEC] Delete admin_approval_for_new_user_signups.yml

See merge request gitlab-org/gitlab!46312

config/feature_flags/development/admin_approval_for_new_user_signups.yml

----
-name: admin_approval_for_new_user_signups
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/43827
-rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/258980
-type: development
-group: group::access
-default_enabled: true