Add patches from KDE's Qt 5 Patch Collection up to 2022-05-14.

KDE has many important patches for the Wayland session, see e.g.: https://www.reddit.com/r/kde/comments/s8etjq/the_patches_required_for_wayland_and_nvidia_to/

This was produced by cloning kde/5.15 branch of https://invent.kde.org/qt/qt/qtwayland, running git format-patch v5.15.4-lts-lgpl -N, and then removing useless lines from patches (diff --git, index, three trailing lines).