wayland: Do not account touch crossing events for pointer

These events may be emitted for touchpoints (in which case they contain
an event sequence). Ignore those as they are not relevant for pointer
picking, and shouldn't influence its focus.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1657>

src/wayland/meta-wayland-pointer.c

@@ -611,8 +611,9 @@ void
 meta_wayland_pointer_update (MetaWaylandPointer *pointer,
                              const ClutterEvent *event)
 {
-  if (event->type == CLUTTER_ENTER ||
-      event->type == CLUTTER_LEAVE)
+  if ((event->type == CLUTTER_ENTER ||
+       event->type == CLUTTER_LEAVE) &&
+      !clutter_event_get_event_sequence (event))
     repick_for_event (pointer, event);
 
   if (event->type == CLUTTER_MOTION ||