ansible: Add service account for host-provisioner

The _k8s-worker_ Ansible role in the configuration policy now uses the
Kubernetes API to create bootstrap tokens for adding worker nodes to the
cluster.  For this to work, the pod running the host-provisioner must be
associated with a service account that has the correct permissions to
create secrets and access the `cluster-info` ConfigMap.

dch-webhooks/ansible-job.yaml

@@ -90,11 +90,15 @@ spec:
         - mountPath: /tmp
           name: tmp
           subPath: tmp
+        - mountPath: /var/tmp
+          name: tmp
+          subPath: tmp
       securityContext:
         runAsNonRoot: true
         runAsUser: 1000
         runAsGroup: 1000
         fsGroup: 1000
+      serviceAccountName: host-provisioner
       volumes:
       - name: dch-root-ca
         configMap: