debian/console-conf@.service: use triggering conditions, make recovery marker file one
debian/console-conf@.service: use triggering conditions, make recovery marker file one

Use triggering conditions for controlling when console-conf should run. We
effectively want it to start if there is no /var/lib/console-conf/complete
file *or* the snapd recovery marker file exists.

Signed-off-by: Maciej Borzecki <5fa2508e2b1cdae720a9c0360bd78f1653429f38@canonical.com>

CanonicalLtd/subiquity,CanonicalLtd/subiquity