* Replace global authz abstraction with one compatible with uid scope
* Replace GettableApiReceiver with models.Receiver in receiver_svc
* GrafanaIntegrationConfig -> models.Integration
* Implement Create/Update methods
* Add optimistic concurrency to receiver API
* Add scope to ReceiversRead & ReceiversReadSecrets
migrates existing permissions to include implicit global scope
* Add receiver create, update, delete actions
* Check if receiver is used by rules before delete
* On receiver name change update in routes and notification settings
* Improve errors
* Linting
* Include read permissions are requirements for create/update/delete
* Alias ngalert/models to ngmodels to differentiate from v0alpha1 model
* Ensure integration UIDs are valid, unique, and generated if empty
* Validate integration settings on create/update
* Leverage UidToName to GetReceiver instead of GetReceivers
* Remove some unnecessary uses of simplejson
* alerting.notifications.receiver -> alerting.notifications.receivers
* validator -> provenanceValidator
* Only validate the modified receiver
stops existing invalid receivers from preventing modification of a valid
receiver.
* Improve error in Integration.Encrypt
* Remove scope from alert.notifications.receivers:create
* Add todos for receiver renaming
* Use receiverAC precondition checks in k8s api
* Linting
* Optional optimistic concurrency for delete
* make update-workspace
* More specific auth checks in k8s authorize.go
* Add debug log when delete optimistic concurrency is skipped
* Improve error message on authorizer.DecisionDeny
* Keep error for non-forbidden errutil errors
* Add single receiver method
* Add receiver permissions
* Add single/multi GET endpoints for receivers
* Remove stable tag from time intervals
See end of PR description here: https://github.com/grafana/grafana/pull/81672
