udev: don't assign INPUT_ID_MOUSE to a touchpad/joystick/touchscreen (#8259)

udev: don't assign INPUT_ID_MOUSE to a touchpad/joystick/touchscreen (#8259)

If a touchpad has MT axes only but not ABS_X/ABS_Y (DualShock 4 controller),
then we hit both the conditions is_touchpad and the later check for
!has_abs_axes here, assigning is_mouse and ID_INPUT_MOUSE later.

This is a bug, we historically only assigned either of of the pointing device
tags ID_INPUT_MOUSE/TOUCHPAD/JOYSTICK/TOUCHSCREEN, never multiple of them.

Note that we cannot just check for has_abs_axes and has_mt_coordinates because
the apple touch mouse has both. We really need to check if the device has
already been assigned something else.

https://bugs.freedesktop.org/show_bug.cgi?id=105050