RHEL-9 base images are whole-disk images with the /boot/efi partition
correctly set up for EFI Secure Boot. This doesn't work with
extract-image because it only mounts the root partition, leaving
/boot/efi empty even though grub2-efi & shim packages are "installed".
This change mounts discovered partitions to mnt/boot, mnt/boot/efi so
all content can be extracted from the image.
Partition detection is done by reading block device attributes and
matching on Boot Loader Specification[1] UIDs or labels as observed in
supported base images.
[1] https://systemd.io/BOOT_LOADER_SPECIFICATION/
Change-Id: I8487002a18ae6ca98609ab68d92ae9173a2b864f
SUSE dropped OpenStack Cloud in 2019 [1], and as a result, some
OpenStack-related repositories were removed from openSUSE Download and
root filesystem images stopped being provided. This change deprecates
Leap releases before 15.3 and employs the extract-image script. It also
moves the extract-image script to the sysprep element, since now it's
also used by openSUSE-related elements.
Additionally, revert the "Remove opensuse related funtests" change [2]
so that the opensuse element is tested again and set the default Leap
release to 15.3.
[1] https://www.zdnet.com/article/suse-drops-openstacks/
[2] https://review.opendev.org/c/openstack/diskimage-builder/+/824002
Change-Id: I73d6323aa65cee69a55e54bc53ed682f096dfc89
