Delayed deletion, enabled by default

Changelog: changed

config/feature_flags/development/always_perform_delayed_deletion.yml

@@ -5,4 +5,4 @@ rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/393622
 milestone: '15.10'
 type: development
 group: group::tenant scale
-default_enabled: false
+default_enabled: true