Move the software RAID code path from grub2-install to
efibootmgr:
- remove the UEFI efibootmgr exception for software RAID
- create and populate the ESPs on the holder disks
- update the NVRAM with all ESPs (the component devices
of the ESP mirror, use unique labels to avoid unintentional
deduplication of entries in the NVRAM)
In addition, use canonical device names for the RAID device for
the ESP: it seems like tinyIPA silently replaces /dev/md/esp
with /dev/md127. Find the next free /dev/md device and use it
instead. Also rescan the resulting device before copying files.
Co-authored-by: Dmitry Tantsur <dtantsur@protonmail.com>
Story: #2009794
Change-Id: I7ed34e595215194a589c2f1cd0b39ff0336da8f1
(cherry picked from commit 62c5674a60)
aeed2df155