cephadm: use new QUIET log level to reduce spam to cephadm.log

cephadm: use new QUIET log level to reduce spam to cephadm.log

The QUIET log level only gets sent to the console or log file
if --verbose is passed to cephadm. This means our regulat metadata
gathering operations won't spam the log file as we don't pass --verbose
when running them, but users can still pass --verbose when running
the commands manually for debugging purposes

Fixes: https://tracker.ceph.com/issues/56552
Signed-off-by: Adam King <adking@redhat.com>
(cherry picked from commit e98d51cbc1db671c935f2d3c20470f72703b0922)