Fix universal rights effect on batch gateway rights assertions

[adriansmares]

Summary

This PR fixes the batch gateway rights assertion behavior for admin users.

Admin users have universal rights over entities, but currently batch gateway rights assertion fails if the admin user is not a collaborator of the gateway, as there is no membership chain between the admin user and the gateway. This PR fixes this issue.

Changes

• Check universal rights as part of the batch gateway rights assertion.

Testing

Manual testing. The steps are somewhat easy in the current v3.28.1.

1. Register a gateway via a normal user, user a.
2. Try to view all gateways in the gateway list via an admin user, user b.
3. You shouldn't see an error (this is currently erroring out in staging1).

Regressions

N/A. This fixes an inconsistency between normal rights and batch rights.

Checklist

• Scope: The referenced issue is addressed, there are no unrelated changes.
• Compatibility: The changes are backwards compatible with existing API, storage, configuration and CLI, according to the compatibility commitments in README.md for the chosen target branch.
• Documentation: Relevant documentation is added or updated.
• The steps/process to test this feature are clearly explained including testing for regressions.
• Changelog: Significant features, behavior changes, deprecations and fixes are added to CHANGELOG.md.
• Commits: Commit messages follow guidelines in CONTRIBUTING.md, there are no fixup commits left.