Merge pull request #19322 from theanalyst/usage-trim-2

rgw: add an option to clear all usage entries

Reviewed-by: Casey Bodley <cbodley@redhat.com>

diff --cc src/cls/rgw/cls_rgw.cc
Simple merge

diff --cc src/cls/rgw/cls_rgw_client.cc
Simple merge

diff --cc src/rgw/rgw_admin.cc
Simple merge

diff --cc src/rgw/rgw_rados.cc
Simple merge

diff --cc src/rgw/rgw_rados.h
Simple merge

diff --cc src/test/cli/radosgw-admin/help.t
Simple merge