Updates to GitLab’s delayed deletion feature for projects and groups

What this post added

Introduced default delayed deletion for projects and groups in GitLab 16.0 for Ultimate and Premium tiers. SaaS users get a 7-day retention, while self-managed users can configure 1-90 days. Removed the immediate deletion option from Admin Area and group settings. Projects are automatically renamed with `-deleted-[projectID]` during pending deletion, allowing immediate reuse of the original name. API parameters `delayed_project_deletion` and `delayed_group_deletion` are removed from `/application/settings` API Task actions, and the API now requires double confirmation for complete deletion.