[cloud] ovirt: add headers param to auth (#27881)

* Add filter param to ovirt module auth

* Update docs to include new filter param

* Fix broken YAML

* Replace filter param with headers

lib/ansible/module_utils/ovirt.py

@@ -143,6 +143,7 @@ def create_connection(auth):
         insecure=auth.get('insecure', False),
         token=auth.get('token', None),
         kerberos=auth.get('kerberos', None),
+        headers=auth.get('headers', None),
     )