Merge pull request #18918 from ZVampirEM77/wip-em-rewrite-cmd

rgw: add rewrite cmd and options into radosgw-admin usage and doc

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

diff --cc doc/man/8/radosgw-admin.rst
Simple merge

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

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