AccessControl: Enable RBAC by default (#48813)

* Add RBAC section to settings

* Default to RBAC enabled settings to true

* Update tests to respect RBAC

Co-authored-by: Karl Persson <kalle.persson@grafana.com>

pkg/tests/api/alerting/api_admin_configuration_test.go

@@ -152,8 +152,8 @@ func TestAdminConfiguration_SendingToExternalAlertmanagers(t *testing.T) {
 
 	// Now, let's set an alert that should fire as quickly as possible.
 	{
-		// create the namespace we'll save our alerts to
-		_, err := createFolder(t, s, 0, "default")
+		// Create the namespace we'll save our alerts to
+		err := createFolder(t, "default", grafanaListedAddr, "grafana", "password")
 		require.NoError(t, err)
 		interval, err := model.ParseDuration("10s")
 		require.NoError(t, err)