rgw: radosgw-admin includes current time in most status commands

rgw: radosgw-admin includes current time in most status commands

Support folk have asked if we can have a timestamp on the output of
multisite status commands so they can see at a glance how they relate
to other events and changes.

As such, we now have a status command added to any outputs where it
doesn't disrupt things. In practice this means anything whose output
isn't a single JSON array.

Signed-off-by: Adam C. Emerson <aemerson@redhat.com>