[effects] Don't register touch edges which don't exist
Summary:
Apparently some old configs made PresentWindows register the top left
corner which does not make any sense as that's not supported by touch.
So to be sure, don't register those edges.
BUG: 383797
FIXED-IN: 5.11
Test Plan: Not tested, I'm on Wayland
Subscribers: plasma-devel, kwin
Tags: KWin
Differential Revision: https://phabricator.kde.org/D7508