* Alerting: Update default route groupBy to [grafana_folder, alertname]
Default group by for new routes and migrations is now [grafana_folder, alertname]
* Define route and run codegen
* Wire up HTTP layer
* Update API layer and test fakes
* Implement reset of policy tree
* Implement service layer test and authorization bindings
* API layer testing
* Be more specific when injecting settings
* Alerting: validate that the receiver exist when updating routing tree
* rename interface
* add missing file
* change constructor
* fix e2e tests
* only import package once
* add unit test for bug
* wording
* close response body
* Update pkg/services/ngalert/api/tooling/definitions/alertmanager_validation.go
* refactor to remove database roundtrip
* Test composition simplification from last PR
* Policies use proper API model everywhere
* Expose policy provenance in API, miss some dep injection
* Complete injection
* fix args
* Tests for provenance value
* Extract test helpers so tests are very readable
* Single source adapter struct that was copied in 3 places
* Drop redundant test
* Resolve merge conflicts on changelog
* Base-line API for provisioning notification policies
* Wire API up, some simple tests
* Return provenance status through API
* Fix missing call
* Transactions
* Clarity in package dependencies
* Unify receivers in definitions
* Fix issue introduced by receiver change
* Drop unused internal test implementation
* FGAC hooks for provisioning routes
* Polish, swap names
* Asserting on number of exposed routes
* Don't bubble up updated object
* Integrate with new concurrency token feature in store
* Back out duplicated changes
* Remove redundant tests
* Regenerate and create unit tests for API layer
* Integration tests for auth
* Address linter errors
* Put route behind toggle
* Use alternative store API and fix feature toggle in tests
* Fixes, polish
* Fix whitespace
* Re-kick drone
* Rename services to provisioning
