d/rules: systemd: Also pass --no-restart-on-upgrade when using --no-start

Guido Güntherrequested to merge
agx/libvirt:no-restart-on-upgrade into debian/sid

d/rules: systemd: Also pass --no-restart-on-upgrade when using --no-start

Using --no-start is not enough to prevent a restart on upgrades.

Fixes: 100e8aa7

Merge request reports