Alerting: Fix active time intervals when time interval is renamed (#108534)

pkg/tests/apis/alerting/notifications/timeinterval/test-data/notification-settings.json

@@ -15,6 +15,9 @@
           ],
           "mute_time_intervals": [
             "test-interval", "persisted-interval"
+          ],
+          "active_time_intervals": [
+            "test-interval", "persisted-interval"
           ]
         }
       ]

pkg/tests/apis/alerting/notifications/timeinterval/timeinterval_test.go

@@ -725,7 +725,9 @@ func TestIntegrationTimeIntervalReferentialIntegrity(t *testing.T) {
 			updatedRoute := legacyCli.GetRoute(t)
 			for idx, route := range updatedRoute.Routes {
 				expectedTimeIntervals := replace(currentRoute.Routes[idx].MuteTimeIntervals, interval.Spec.Name, actual.Spec.Name)
-				assert.Equalf(t, expectedTimeIntervals, route.MuteTimeIntervals, "time interval in routes should have been renamed but it did not")
+				assert.Equalf(t, expectedTimeIntervals, route.MuteTimeIntervals, "mute time interval in routes should have been renamed but it did not")
+				expectedTimeIntervals = replace(currentRoute.Routes[idx].ActiveTimeIntervals, interval.Spec.Name, actual.Spec.Name)
+				assert.Equalf(t, expectedTimeIntervals, route.ActiveTimeIntervals, "active time interval in routes should have been renamed but it did not")
 			}
 
 			interval = *actual