K8s/FeatureFlags: Add an apiserver to manage feature flags (dev only) (#80501)

* add deployment registry API cloud only

* update versions

* add feature flag endpoints

* use helpers

* merge main

* update AllowSelfServie and re-run code gen

* fix package name

* add allowselfserve flag to payload

* remove config

* update list api to return the full registry including states

* change enabled check

* fix compile error

* add feature toggle and split path in frontend

* changes

* with status

* add more status/state

* add back config thing

* add back config thing

* merge main

* merge main

* now on the /current api endpoint

* now on the /current api endpoint

* drop frontend changes

* change group name to featuretoggle (singular)

* use the same settings

* now with patch

* more common refs

* more common refs

* WIP actually do the webhook

* fix comment

* fewer imports

* registe standalone

* one less file

* fix singular name

---------

Co-authored-by: Michael Mandrus <michael.mandrus@grafana.com>

pkg/cmd/grafana/apiserver/server.go

@@ -14,8 +14,12 @@ import (
 
 	"github.com/grafana/grafana/pkg/registry/apis/datasource"
 	"github.com/grafana/grafana/pkg/registry/apis/example"
+	"github.com/grafana/grafana/pkg/registry/apis/featuretoggle"
+	"github.com/grafana/grafana/pkg/services/featuremgmt"
 	grafanaAPIServer "github.com/grafana/grafana/pkg/services/grafana-apiserver"
 	"github.com/grafana/grafana/pkg/services/grafana-apiserver/utils"
+	"github.com/grafana/grafana/pkg/services/licensing"
+	"github.com/grafana/grafana/pkg/setting"
 )
 
 const (
@@ -47,6 +51,12 @@ func (o *APIServerOptions) loadAPIGroupBuilders(args []string) error {
 		// No dependencies for testing
 		case "example.grafana.app":
 			o.builders = append(o.builders, example.NewTestingAPIBuilder())
+		case "featuretoggle.grafana.app":
+			features, err := featuremgmt.ProvideManagerService(&setting.Cfg{}, &licensing.OSSLicensingService{})
+			if err != nil {
+				return err
+			}
+			o.builders = append(o.builders, featuretoggle.NewFeatureFlagAPIBuilder(features))
 		case "testdata.datasource.grafana.app":
 			ds, err := datasource.NewStandaloneDatasource(g)
 			if err != nil {