Prometheus: Turn new auth component feature toggle on by default (#74405)

* turn auth feature toggle on by default

* fix e2e test

* fix e2e test

* fix e2e test

pkg/services/featuremgmt/registry.go

@@ -666,8 +666,9 @@ var (
 		{
 			Name:        "prometheusConfigOverhaulAuth",
 			Description: "Update the Prometheus configuration page with the new auth component",
-			Stage:       FeatureStageExperimental,
 			Owner:       grafanaObservabilityMetricsSquad,
+			Stage:       FeatureStageGeneralAvailability,
+			Expression:  "true", // on by default
 		},
 		{
 			Name:            "configurableSchedulerTick",

pkg/services/featuremgmt/toggles_gen.csv

@@ -95,7 +95,7 @@ awsAsyncQueryCaching,preview,@grafana/aws-datasources,false,false,false,false
 splitScopes,preview,@grafana/grafana-authnz-team,false,false,true,false
 azureMonitorDataplane,GA,@grafana/partner-datasources,false,false,false,false
 permissionsFilterRemoveSubquery,experimental,@grafana/backend-platform,false,false,false,false
-prometheusConfigOverhaulAuth,experimental,@grafana/observability-metrics,false,false,false,false
+prometheusConfigOverhaulAuth,GA,@grafana/observability-metrics,false,false,false,false
 configurableSchedulerTick,experimental,@grafana/alerting-squad,false,false,true,false
 influxdbSqlSupport,experimental,@grafana/observability-metrics,false,false,false,false
 noBasicRole,experimental,@grafana/grafana-authnz-team,false,false,true,true