* Alerting: Protect sensitive fields of contact points from
unauthorized modification
- Introduce a new permission alert.notifications.receivers.protected:write. The permission is granted to contact point administrators.
- Introduce field Protected to NotifierOption
- Introduce DiffReport for models.Integrations with focus on Settings. The diff report is extended with methods that return all keys that are different between two settings.
- Add new annotation 'grafana.com/access/CanModifyProtected' to Receiver model
- Update receiver service to enforce the permission and return status 403 if unauthorized user modifies protected field
- Update receiver testing API to enforce permission and return status 403 if unauthorized user modifies protected field.
- Update UI to disable protected fields if user cannot modify them
* add support for converting Mimir integrations to Integration
* implement imported config revision
* update service to load staged receivers if configured
* make sure non-Grafana origin cannot be mutated
* set access control metadata for imported origin
* set includeImported from feature flag. Disabled for service used by provisioning
* add tests for new functionality
* add snapshot-based integration test
Yuri Tseretyan
Matthew Jacobson