Users::MigrateRecordsToGhostUserInBatchesWorker exception due to workspace record with PAT
<!---
Please read this!
Before opening a new issue, make sure to search for keywords in the issues
filtered by the "regression" or "type::bug" label:
- https://gitlab.com/gitlab-org/gitlab/issues?label_name%5B%5D=regression
- https://gitlab.com/gitlab-org/gitlab/issues?label_name%5B%5D=type::bug
and verify the issue you're about to submit isn't a duplicate.
--->
### Summary
<!-- Summarize the bug encountered concisely. -->
User deletions fail because of workspace records that reference a personal access token that is being deleted, raising an exception.
```
ERROR: update or delete on table "personal_access_tokens" violates foreign key constraint "fk_ec70695b2c" on table "workspaces" (PG::ForeignKeyViolation)
DETAIL: Key (id)=(TOKEN_ID) is still referenced from table "workspaces".
```
Related:
- https://gitlab.com/gitlab-org/gitlab/-/issues/520439+
- https://gitlab.com/gitlab-org/gitlab/-/merge_requests/129688+
### Steps to reproduce
<!-- Describe how one can reproduce the issue - this is very important. Please use an ordered list. -->
- [Create a workspace](https://docs.gitlab.com/user/workspace/configuration/#create-a-workspace)
- Attempt to delete the user
### What is the current *bug* behavior?
<!-- Describe what actually happens. -->
- The user is never deleted because the worker runs into an exception
### What is the expected *correct* behavior?
<!-- Describe what you should see instead. -->
- The user is deleted because any records are handled as expected
### Relevant logs and/or screenshots
<!-- Paste any relevant logs - please use code blocks (```) to format console output, logs, and code
as it's tough to read otherwise. -->
- https://log.gprd.gitlab.net/app/r/s/jBnqy
- https://new-sentry.gitlab.net/organizations/gitlab/issues/1628181/?project=3
<!-- If you don't have /label privileges, follow up with an issue comment of `@gitlab-bot label ~"type::bug"` -->
issue