Wayland: set KWayland outputs data in output class
Summary:
When sending a new config to KWayland set the output specific data of the
configuration in WaylandOutput instead of WaylandConfig. This simplifies
the code and keeps responsibilities better separated.
Test Plan:
Changing various parameters in Wayland session. Mode setting is half broken
like it was before on my test setup.
Reviewers: Plasma
Subscribers: plasma-devel
Tags: Plasma
Differential Revision: https://phabricator.kde.org/D23028