Switch KDE Plasma kwin (the WM & Compositor) to xwayland-devel

This makes Plasma co-installable with sway and river and other
Wayland-based compositors and makes life much easier for the
folks working on Wayland bits, since then all the "current"
compositors depend on the same wayland, rather than conflicting
over xwayland vs. xwayland-devel.

PR: 244016
Submitted by: jbeich
Reported by: jbeich