Gather extra facts for healthcheck playbooks

Depends-On: https://review.opendev.org/c/openstack/openstack-ansible-lxc_hosts/+/795102
Change-Id: I71781607c0d2c2bb4682920f7d3c959dc72355f1

playbooks/healthcheck-hosts.yml

@@ -36,6 +36,13 @@
   hosts: all_containers
   gather_facts: yes
   tasks:
+    - name: Gather additional facts
+      setup:
+        gather_subset: "!all,network"
+        filter: ansible_interfaces
+      delegate_to: "{{ physical_host }}"
+      delegate_facts: true
+
     - name: Ensure the physical host has all the proper interfaces defined
       assert:
         that: