wait for gc in lock tracker test (#934)

* wait for gc in lock tracker test

* cleanup

* generated protobuf

---------

Co-authored-by: github-actions <41898282+github-actions[bot]@users.noreply.github.com>

Author: paulwe

utils/lock_tracker_test.go

@@ -96,17 +96,21 @@ func TestMutexFinalizer(t *testing.T) {
 	cleanupTest()
 	require.Equal(t, 0, utils.NumMutexes())
 
-	go func() {
+	{
 		m := &utils.Mutex{}
 		m.Lock()
 		go func() {
 			m.Unlock()
 		}()
 		require.Equal(t, 1, utils.NumMutexes())
-	}()
+	}
 
-	time.Sleep(time.Millisecond)
-	cleanupTest()
+	for range 100 {
+		cleanupTest()
+		if utils.NumMutexes() == 0 {
+			break
+		}
+	}
 
 	require.Equal(t, 0, utils.NumMutexes())
 }