Access control: expose permissions to the frontend (#32954)

* Expose user permissions to the frontend

* Do not include empty scope

* Extend ContextSrv with hasPermission() method

* Add access control types

* Fix type error (make permissions optional)

* Fallback if access control disabled

* Move UserPermission to types

* Simplify hasPermission()

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

@@ -46,6 +46,7 @@ export interface FeatureToggles {
   live: boolean;
   ngalert: boolean;
   panelLibrary: boolean;
+  accesscontrol: boolean;
 
   /**
    * @remarks

packages/grafana-runtime/src/config.ts

@@ -57,6 +57,7 @@ export class GrafanaBootConfig implements GrafanaConfig {
     ngalert: false,
     panelLibrary: false,
     reportVariables: false,
+    accesscontrol: false,
   };
   licenseInfo: LicenseInfo = {} as LicenseInfo;
   rendererAvailable = false;