Add breakpoint units for the newly-introduced systemd.break=
functionality.
Reference: systemd/systemd#35410
Fixes: https://github.com/dracut-ng/dracut-ng/issues/1677
"$systemdsystemunitdir"/paths.target \
"$systemdsystemunitdir"/umount.target \
"$systemdsystemunitdir"/sys-kernel-config.mount \
+ "$systemdsystemunitdir"/breakpoint-pre-basic.service \
+ "$systemdsystemunitdir"/breakpoint-pre-udev.service \
+ "$systemdsystemunitdir"/breakpoint-pre-mount.service \
+ "$systemdsystemunitdir"/breakpoint-pre-switch-root.service \
"$systemdsystemunitdir"/systemd-halt.service \
"$systemdsystemunitdir"/systemd-poweroff.service \
"$systemdsystemunitdir"/systemd-reboot.service \