core: simplify - don't add jobs to dbus queue if we immediately remove them (#7251)

core: simplify - don't add jobs to dbus queue if we immediately remove them (#7251)

job_finish_and_invalidate() calls job_free() to destroy jobs (and remove
them from the dbus queue).  So we don't need to add them to the dbus queue
first.

We only want to add jobs to the dbus queue if they're a restart job, which
we're transmogrifying into a start job and putting back into the system.