RBAC: Enable rbac when creating new settings (#53531)

* Settings: Set RBACEnabled to true by default

* Remove accessControlEnabledFlag and explicitly set to false when needed

* Disable rbac for tests

pkg/services/sqlstore/sqlstore.go

@@ -632,7 +632,6 @@ func initTestDB(migration registry.DatabaseMigrator, opts ...InitTestDBOpt) (*SQ
 
 		// set test db config
 		cfg := setting.NewCfg()
-		cfg.RBACEnabled = true
 		cfg.IsFeatureToggleEnabled = func(key string) bool {
 			for _, enabledFeature := range features {
 				if enabledFeature == key {