WorkspacesToBeReturnedUpdater update query performance
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MR Pending
# Description
Check the expected max rows and improve [WorkspacesToBeReturnedUpdater query update performance](https://gitlab.com/gitlab-org/gitlab/-/blob/6343b14aad94cebaadf41b5437531d6c863bf57a/ee/lib/remote_development/workspaces/reconcile/persistence/workspaces_to_be_returned_updater.rb)
Follow-up from "Force full reconciliation logic for workspaces"
# Acceptance criteria
- [ ] Identify max number of records
- [ ] Solution: Do a batched update and consider doing a full update rather than partial
issue