Add ensure-* roles to container image jobs

This is in the zuul-jobs pre-playbook, but we don't actually inherit
from those jobs so we need to duplicate it.

Change-Id: I875df74936736b80dbb2f29bbb474b993f4616ea

playbooks/container-image/pre.yaml

@@ -1,3 +1,13 @@
-- hosts: localhost
-  roles:
-    - pull-from-intermediate-registry
+- hosts: all
+  tasks:
+    - name: Ensure docker is installed
+      when: "container_command == 'docker'"
+      include_role:
+        name: ensure-docker
+    - name: Ensure podman is installed
+      when: "container_command != 'docker'"
+      include_role:
+        name: ensure-podman
+    - name: Pull from intermediate registry
+      include_role:
+        name: pull-from-intermediate-registry