rgw/sts: test for s3:ResourceTag in role's permission policy
rgw/sts: test for s3:ResourceTag in role's permission policy

Signed-off-by: Pritha Srivastava <c4eb7d6c562b5c6d834baa1ef77ce6e57663ddf1@redhat.com>

ceph/s3-tests,ceph/s3-tests