feat(auth): fix tests broken by multi-tenancy

[njlie]

Changes proposed in this pull request

• Fixes all auth tests that have a tenantId constraint.
  • Adds tenantId to grants when they are created in tests.

Context

Fixes #3009.

Checklist

• [x] Related issues linked using fixes #number
• [x] Tests added/updated
• [ ] Make sure that all checks pass
• [ ] Bruno collection updated (if necessary)
• [ ] Documentation issue created with user-docs label (if necessary)
• [ ] OpenAPI specs updated (if necessary)