core: when determining system state, don't bother with JOB_TRY_RESTART

core: when determining system state, don't bother with JOB_TRY_RESTART

When we determine the current system state we check whether units like emergency.target are running or a job that
results in them being run is queued. However, this is not the case for JOB_TRY_RESTART, since that's a NOP if the unit
has not been running before. Hence, don't bother with checking for that job type.