certmap rules: altSecurityIdentities should only be used for trusted domains
IPA LDAP has no altSecurityIdentities in use, it only should apply to
identities in trusted Active Directory domains.
Add checks to enforce proper certmap rule attribution for specific
Active Directory domains.
Related: https://pagure.io/freeipa/issue/7932
Reviewed-By: Florence Blanc-Renaud <flo@redhat.com>