wayland: Avoid repetitive move() and resize() calls during interactive move/resize

With internal clients and xdg-shell clients, geometry updates occur in
asynchronous fashion when interactively resizing the window.

As is, performInteractiveMoveResize() will call resize() if the move
resize geometry is different from the current frame geometry. This can
result in kwin sending excessive configure events.

With this change, kwin will send less configure events during
interactive resize.