Don't clean up the gitlab-test-fork_bare repo

What does this MR do?

Fix a failing test

Are there points in the code the reviewer needs to double check?

Why was this MR needed?

Failing tests on master: https://gitlab.com/gitlab-org/gitlab-ce/issues/30284

Does this MR meet the acceptance criteria?

• Tests
  • All builds are passing
• Conform by the merge request performance guides
• Conform by the style guides
• Branch has no merge conflicts with master (if it does - rebase it please)
• Squashed related commits together

What are the relevant issue numbers?

Closes #30284 (closed)