This partially reverts
d766c75acdd825abe1bcfd45406ae2e609a008b6.
The offending commit tries to block systemd-udevd.service
from being activated during switch-root, but it is a dirty hack
and causes problems with e.g. Ctrl-Alt-Delete handling which
actually need to start a conflicting target. Let's revert
this here, and the original issue will be resolved in a cleaner
fashion in later commits.
[Service]
Type=oneshot
ExecStart=systemctl --no-block isolate initrd-switch-root.target
-ExecStart=systemctl --no-block --job-mode=replace-irreversibly start initrd-switch-root.service