SKIP UPGRADE CHECK: gitlab update to 9.0.1-bb.0

Package Merge Request

Package Changes

https://repo1.dso.mil/big-bang/product/packages/gitlab/-/blob/9.0.1-bb.0/CHANGELOG.md

Package MR

big-bang/product/packages/gitlab!383 (merged)

For Issue

Closes big-bang/product/packages/gitlab#325 (closed)

Upgrade Notices

This is a major version change for Gitlab and as such there are some breaking changes that users may need to be aware of. Gitlab lists all of the changes on their blog:

https://about.gitlab.com/blog/2025/04/18/aguidetothebreakingchangesingitlab180/

We have upgraded the built in postgres to version 17.4.0 that is hosted in Iron Bank. if you are not going by recommended route of using an external database for Gitlab, you will need to manually migrate your data from Postgres 16 to 17 before/during the upgrade. Otherwise, you will run into an error.