wayland: show cursor if stylus is in proximity

While a stylus is in proximity we want to show its cursor. In this commit
it only gets shown on move because for a still unknown reason the position
is out of date before the first move event.

BUG: 443921
2 jobs for !1731 with work/tablet-pointer in 21 minutes and 45 seconds (queued for 5 seconds)
latest detached
Status Name Job ID Coverage
  Build
passed freebsd_qt515 #165281
FreeBSD

00:06:56

passed suse_tumbleweed_qt515 #165280
Linux

00:21:45