Finish incomplete work on state management logic, testing, and test fixtures
# Description
This issue represents the follow-up work related to state management logic, testing, and test fixtures.
See the following MRs for a partial, incomplete implementation of this work:
- https://gitlab.com/gitlab-org/gitlab/-/merge_requests/117520+
- https://gitlab.com/gitlab-org/gitlab/-/merge_requests/117136+
issue