cephadm: add listing_updaters module

cephadm: add listing_updaters module

Add a small suite of new daemon status updater subclasses to a
listing_updaters.py. These classes were not put directly in listing.py
as I wanted to keep that module smaller with few complex dependencies.

These updater classes, based on the temporary
_update_daemon_and_container_status and _update_legacy_status functions
in cephadm.py will be used to replace those functions in a future
change.

Signed-off-by: John Mulligan <jmulligan@redhat.com>