Alerting: Expose updated_by in rules GET APIs (#99525)

---------

Signed-off-by: Yuri Tseretyan <yuriy.tseretyan@grafana.com>

pkg/services/ngalert/api/api.go

@@ -24,6 +24,7 @@ import (
 	"github.com/grafana/grafana/pkg/services/ngalert/state"
 	"github.com/grafana/grafana/pkg/services/ngalert/store"
 	"github.com/grafana/grafana/pkg/services/quota"
+	"github.com/grafana/grafana/pkg/services/user"
 	"github.com/grafana/grafana/pkg/setting"
 )
 
@@ -78,6 +79,7 @@ type API struct {
 	Historian            Historian
 	Tracer               tracing.Tracer
 	AppUrl               *url.URL
+	UserService          user.Service
 
 	// Hooks can be used to replace API handlers for specific paths.
 	Hooks *Hooks
@@ -135,6 +137,7 @@ func (api *API) RegisterAPIEndpoints(m *metrics.API) {
 			amConfigStore:      api.AlertingStore,
 			amRefresher:        api.MultiOrgAlertmanager,
 			featureManager:     api.FeatureManager,
+			userService:        api.UserService,
 		},
 	), m)
 	api.RegisterTestingApiEndpoints(NewTestingApi(