* Because of https://gitlab.com/gitlab-org/gitlab/issues/36805, the
`can_update_branch?` function needs to check for an internal project.
Otherwise, `project.branch_allows_collaboration?` gets stuck in a
permission checking loop.

* Adds a changelog entry

* Adds a `Project` spec to check that the loop doesn't happen from the
project end.

* Also adds a `Gitlab::UserAccess` spec to make sure it doesn't happen
there as well.

Resolves: https://gitlab.com/gitlab-org/gitlab/issues/36805