MM-42652: Skip Flaky test in CreateCategoryForTeamForUser (#19857)

https://mattermost.atlassian.net/browse/MM-42652

```release-note
NONE
```

api4/channel_category_test.go

@@ -91,6 +91,7 @@ func TestCreateCategoryForTeamForUser(t *testing.T) {
 	})
 
 	t.Run("should publish expected WS payload", func(t *testing.T) {
+		t.Skip("MM-42652")
 		userWSClient, err := th.CreateWebSocketClient()
 		require.NoError(t, err)
 		defer userWSClient.Close()