appiumtests: skip touch gesture tests in the CI

The test is too flaky in the CI, due to various reasons like Qt filtering
out touch events for no reason. Skip it for now and enable it when there
is a chance in the future.

Typical output when pointerinputtest fails:

```
sending touch_down at QPoint(100,100)
touch down 0
sending touch_up
qt.pointer.dispatch: skipping QEventPoint(id=0 ts=0 pos=0,0 scn=0,0 gbl=0,0 Released vel=0,0 press=0,0 last=0,0 Δ 0,0) : no target window
```


(cherry picked from commit 0c6a2a34)