Merge pull request #59631 from thotz/create-user-without-creds-cli

radosgw-admin: create user without creds cli

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