Add nova-super-conductor to inventory

This is a new group, added to kolla ansible for multiple nova cells
support.

Depends-On: https://review.opendev.org/675659
Depends-On: https://review.opendev.org/688697

Change-Id: I65e0175402441ba6422f12ebd4baa06640b9181b
Story: 2004291
Task: 37132

ansible/roles/kolla-ansible/templates/overcloud-services.j2

@@ -22,6 +22,9 @@ nova
 [nova-conductor:children]
 nova
 
+[nova-super-conductor:children]
+nova
+
 [nova-consoleauth:children]
 nova