Add informers and internal go routines in manager (#2870)

* used manager's Add function in more places
* exit when ctx.Done is received in archivePruner go routines
* fix manager tests
* fix data race
* added more gpm function in manager and removed manager from a util function
* closed unused channel and stopped ticker after context is done
* added log statements
* used context.Done inside function instead of stopper channel

pkg/mqtrigger/mqtmanager.go

@@ -86,7 +86,9 @@ func (mqt *MessageQueueTriggerManager) Run(ctx context.Context, mgr manager.Inte
 		if err != nil {
 			return err
 		}
-		go informer.Run(ctx.Done())
+		mgr.Add(ctx, func(ctx context.Context) {
+			informer.Run(ctx.Done())
+		})
 		if ok := k8sCache.WaitForCacheSync(ctx.Done(), informer.HasSynced); !ok {
 			mqt.logger.Fatal("failed to wait for caches to sync")
 		}