mkosi: openSUSE update --bootable=no dependencies

Since we can build --bootable=no images without dracut->systemd, we need
to add systemd runtime dependencies explicitely.

(cherry picked from commit f2bb8857)
(cherry picked from commit 731a4d9cd6bf471d22b6ac637e49dcd477a92ac6)
(cherry picked from commit 103dfac36b938ce12d33b6379758197e86a262d45)