Verify protected tags permissions for pull mirroring

Contributes to https://gitlab.com/gitlab-org/gitlab/-/issues/352494

Changelog: added

config/feature_flags/development/verify_protected_tags_for_pull_mirror.yml

@@ -5,4 +5,4 @@ rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/352494
 milestone: '14.9'
 type: development
 group: group::source code
-default_enabled: false
+default_enabled: true