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/storagesvc/storagesvc.go

@@ -316,7 +316,9 @@ func Start(ctx context.Context, clientGen crd.ClientGeneratorInterface, logger *
 		if err != nil {
 			return errors.Wrap(err, "Error creating archivePruner")
 		}
-		go pruner.Start(ctx)
+		mgr.Add(ctx, func(ctx context.Context) {
+			pruner.Start(ctx, mgr)
+		})
 	}
 
 	logger.Info("storage service started")