For flatpak mostly.

Package renamed.

- stage3: Only require alterator-grub for arches that have grub.
- stage3: Drop wrong installer-altlinux-generic-stage3 provides.
- stage3: Don't require dhcpcd.
- stage3: Require alterator-grub.
- Fix license tag.
- stage3: Don't overwrite default-groups config file.
- stage2: Drop installer-feature-vm-altlinux-generic-stage2.

It is useless anyway.

There can be file with another set of groups already. So merge these
files.

This is not needed, we are use volumes-profile-regular for now.

- postinstall: Remove alterator-wizardface and alterator-luks.
- Forked from installer-distro-altlinux-desktop.

Apparently alterator-wizardface is not needed in the installed
system and alterator-luks doesn't work (see ALT bug #37785).

Forked from installer-distro-altlinux-desktop.