zeta: Rename binding back to `user_store` (#35486)
This PR renames a binding from `cloud_user_store` to `user_store` now
that we've consolidated the two into the `UserStore`.
Release Notes:
- N/A
a3a3f111f8Marshall Bowers committed on 8/1/2025, 6:44:17 PM· committed by GitHubparentfaa45c5