Implement secure RBAC for share group type specs
Implement secure RBAC for share group type specs

This commit updates the policies for share group type specs to understand scope
checking and account for a read-only role. This is part of a broader series of
changes across OpenStack to provide a consistent RBAC experience and improve
security.

Change-Id: Ie1b72459ae060693badb6fe864454836a4ff1300

openstack/manila,openstack/manila