Revert "Run Qt applications as native Wayland by default"
This reverts commit be03a255, which breaks too much stuff.
Let's try again on Bookworm: #19303 (closed)
Closes #19327 (closed), #19329 (closed), #19326 (closed)
Also closes #19330 (closed) (which did not deserve a dedicated MR).
Edited by intrigeri