[Qt6 Base] Add patch fot QStandardPaths on macOS
This is a slightly improved version of the patch we already use with Qt5
Not yet tested, will do that later
Maybe we also need to add https://invent.kde.org/packaging/craft-blueprints-kde/-/blob/master/libs/qt5/qtbase/.qt-kde-5.15/fix_GenericDataLocation_mac.patch but that also needs testing.