- 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.