Disable enforcing scopes in Neutron temporary

After patch [1] was merged in Neutron, enforcing scopes there
is broken.
So lets disable it temporary to unblock Devstack's gate for now.

[1] https://review.opendev.org/c/openstack/neutron/+/821208

Related-Bug: #1959196
Change-Id: I24da6f3897a638749d16f738329a873a5f9a291d

.zuul.yaml

@@ -619,7 +619,9 @@
         # Keep enabeling the services here to run with system scope
         CINDER_ENFORCE_SCOPE: true
         GLANCE_ENFORCE_SCOPE: true
-        NEUTRON_ENFORCE_SCOPE: true
+        # TODO(slaweq): Enable enforce scopes in Neutron when bug
+        # https://bugs.launchpad.net/neutron/+bug/1959196 will be fixed
+        # NEUTRON_ENFORCE_SCOPE: true
 
 - job:
     name: devstack-multinode