Prometheus: Browser resource caching (#60711)

Add cache control headers and range snapping to Prometheus resource API calls.

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

@@ -83,6 +83,7 @@ export interface FeatureToggles {
   traceqlSearch?: boolean;
   prometheusMetricEncyclopedia?: boolean;
   timeSeriesTable?: boolean;
+  prometheusResourceBrowserCache?: boolean;
   influxdbBackendMigration?: boolean;
   clientTokenRotation?: boolean;
   disableElasticsearchBackendExploreQuery?: boolean;