Revert OCCM standard dnsPolicy to ClusterFirst and make dnsPolicy configurable to support 10618 (#11168)

roles/kubernetes-apps/external_cloud_controller/openstack/defaults/main.yml

@@ -23,3 +23,4 @@ external_openstack_cacert: "{{ lookup('env', 'OS_CACERT') }}"
 external_openstack_cloud_controller_extra_args: {}
 external_openstack_cloud_controller_image_tag: "v1.28.2"
 external_openstack_cloud_controller_bind_address: 127.0.0.1
+external_openstack_cloud_controller_dns_policy: ClusterFirst

roles/kubernetes-apps/external_cloud_controller/openstack/templates/external-openstack-cloud-controller-manager-ds.yml.j2

@@ -81,7 +81,9 @@ spec:
             - name: CLOUD_CONFIG
               value: /etc/config/cloud.conf
       hostNetwork: true
-      dnsPolicy: ClusterFirstWithHostNet
+{% if external_openstack_cloud_controller_dns_policy is defined %}
+      dnsPolicy: {{ external_openstack_cloud_controller_dns_policy }}
+{% endif %}
       volumes:
 {% if kubelet_flexvolumes_plugins_dir is defined %}
       - name: flexvolume-dir