Alerting: New API endpoint GET /api/v1/ngalert (#55134)

* declare new endpoint /api/v1/ngalert
* add authorization for new path
* add request handler for the new path

pkg/services/ngalert/api/generated_base_api_configuration.go

@@ -22,6 +22,7 @@ type ConfigurationApi interface {
 	RouteDeleteNGalertConfig(*models.ReqContext) response.Response
 	RouteGetAlertmanagers(*models.ReqContext) response.Response
 	RouteGetNGalertConfig(*models.ReqContext) response.Response
+	RouteGetStatus(*models.ReqContext) response.Response
 	RoutePostNGalertConfig(*models.ReqContext) response.Response
 }
 
@@ -34,6 +35,9 @@ func (f *ConfigurationApiHandler) RouteGetAlertmanagers(ctx *models.ReqContext)
 func (f *ConfigurationApiHandler) RouteGetNGalertConfig(ctx *models.ReqContext) response.Response {
 	return f.handleRouteGetNGalertConfig(ctx)
 }
+func (f *ConfigurationApiHandler) RouteGetStatus(ctx *models.ReqContext) response.Response {
+	return f.handleRouteGetStatus(ctx)
+}
 func (f *ConfigurationApiHandler) RoutePostNGalertConfig(ctx *models.ReqContext) response.Response {
 	// Parse Request Body
 	conf := apimodels.PostableNGalertConfig{}
@@ -75,6 +79,16 @@ func (api *API) RegisterConfigurationApiEndpoints(srv ConfigurationApi, m *metri
 				m,
 			),
 		)
+		group.Get(
+			toMacaronPath("/api/v1/ngalert"),
+			api.authorize(http.MethodGet, "/api/v1/ngalert"),
+			metrics.Instrument(
+				http.MethodGet,
+				"/api/v1/ngalert",
+				srv.RouteGetStatus,
+				m,
+			),
+		)
 		group.Post(
 			toMacaronPath("/api/v1/ngalert/admin_config"),
 			api.authorize(http.MethodPost, "/api/v1/ngalert/admin_config"),