Rendering: Experimental support to use JWTs as auth method (#60841)

* Rendering: Add support for auth through JWT

* Goimports

* Apply review suggestions

* Correct feature toggle ref

* Minor changes

packages/grafana-data/src/types/featureToggles.gen.ts

@@ -92,4 +92,5 @@ export interface FeatureToggles {
   alertStateHistoryLokiPrimary?: boolean;
   alertStateHistoryLokiOnly?: boolean;
   unifiedRequestLog?: boolean;
+  renderAuthJWT?: boolean;
 }