Alerting: Provisioning API - Notification Policies (#46755)

* 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

pkg/services/ngalert/api/api.go

@@ -11,11 +11,13 @@ import (
 	"github.com/grafana/grafana/pkg/services/accesscontrol"
 	"github.com/grafana/grafana/pkg/services/datasourceproxy"
 	"github.com/grafana/grafana/pkg/services/datasources"
+	"github.com/grafana/grafana/pkg/services/featuremgmt"
 	apimodels "github.com/grafana/grafana/pkg/services/ngalert/api/tooling/definitions"
 	"github.com/grafana/grafana/pkg/services/ngalert/eval"
 	"github.com/grafana/grafana/pkg/services/ngalert/metrics"
 	"github.com/grafana/grafana/pkg/services/ngalert/models"
 	"github.com/grafana/grafana/pkg/services/ngalert/notifier"
+	"github.com/grafana/grafana/pkg/services/ngalert/provisioning"
 	"github.com/grafana/grafana/pkg/services/ngalert/schedule"
 	"github.com/grafana/grafana/pkg/services/ngalert/state"
 	"github.com/grafana/grafana/pkg/services/ngalert/store"
@@ -64,7 +66,7 @@ type API struct {
 	ExpressionService    *expr.Service
 	QuotaService         *quota.QuotaService
 	Schedule             schedule.ScheduleService
-	TransactionManager   store.TransactionManager
+	TransactionManager   provisioning.TransactionManager
 	RuleStore            store.RuleStore
 	InstanceStore        store.InstanceStore
 	AlertingStore        AlertingStore
@@ -74,6 +76,7 @@ type API struct {
 	StateManager         *state.Manager
 	SecretsService       secrets.Service
 	AccessControl        accesscontrol.AccessControl
+	Policies             *provisioning.NotificationPolicyService
 }
 
 // RegisterAPIEndpoints registers API handlers
@@ -126,4 +129,11 @@ func (api *API) RegisterAPIEndpoints(m *metrics.API) {
 			scheduler: api.Schedule,
 		},
 	), m)
+
+	if api.Cfg.IsFeatureToggleEnabled(featuremgmt.FlagAlertProvisioning) {
+		api.RegisterProvisioningApiEndpoints(NewForkedProvisioningApi(&ProvisioningSrv{
+			log:      logger,
+			policies: api.Policies,
+		}), m)
+	}
 }