x11/lightdm: Update to 1.33.0
- Download distribution using GITHUB
- Stop limiting portscout to even versions
- Add QT6 support option, alternative to QT5
- Remove upstreamed patches
- Fix vt multiseat support [1]
Many thanks to tijl for help and testing and finding solution for
[1], which was causing regressions with polkit integration.
Reviewed by: tijl
Tested by: tijl