Alerting: New feature toggle for enabling standalone alerts (#25984)

* Add feature toggle for standalone alerts

* Add IsStandaloneAlertsEnabled exported func

docs/sources/administration/configuration.md

@@ -1349,4 +1349,4 @@ For more information about Grafana Enterprise, refer to [Grafana Enterprise]({{<
 
 ### enable
 
-Keys of alpha features to enable, separated by space. Available alpha features are: `transformations`
+Keys of alpha features to enable, separated by space. Available alpha features are: `transformations`, `standaloneAlerts`

packages/grafana-data/src/types/config.ts

@@ -41,6 +41,7 @@ export interface FeatureToggles {
   meta: boolean;
   datasourceInsights: boolean;
   reportGrid: boolean;
+  standaloneAlerts: boolean;
 }
 
 /**

packages/grafana-runtime/src/config.ts

@@ -55,6 +55,7 @@ export class GrafanaBootConfig implements GrafanaConfig {
     meta: false,
     datasourceInsights: false,
     reportGrid: false,
+    standaloneAlerts: false,
   };
   licenseInfo: LicenseInfo = {} as LicenseInfo;
   rendererAvailable = false;

pkg/setting/setting.go

@@ -309,6 +309,11 @@ func (c Cfg) IsExpressionsEnabled() bool {
 	return c.FeatureToggles["expressions"]
 }
 
+// IsStandaloneAlertsEnabled returns whether the standalone alerts feature is enabled.
+func (c Cfg) IsStandaloneAlertsEnabled() bool {
+	return c.FeatureToggles["standaloneAlerts"]
+}
+
 type CommandLineArgs struct {
 	Config   string
 	HomePath string