nova-libvirt: add UEFI packages to support UEFI instances
Fix inability to run UEFI-based images/instances by installing UEFI
packages also in nova-libvirt image which is not based on nova-base.
Includes support for C8.
Backport below Train w/o C8.
Co-authored-by: Marcin Juszkiewicz <email@example.com>
Co-authored-by: Radosław Piliszek <firstname.lastname@example.org>
(cherry picked from commit