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/utils/manager/manager_test.go

@@ -53,6 +53,8 @@ func TestAddAndWaitWithTimeout(t *testing.T) {
 	err := mgr.WaitWithTimeout(1 * time.Second)
 	require.NotNil(t, err, "manager WaitWithTimeout did not return an error when timeout exceeded")
 
+	mgr = New()
+
 	expectedValue := 11
 	mgr.Add(context.Background(), func(ctx context.Context) {
 		time.Sleep(100 * time.Millisecond)