Add a config item for novncproxy

In deployment-novncproxy.yaml, it set hostNetwork = true.
In some cases, we may want to let it use cluster network instead of
hostNetwork.
We'd better add a config item, so that client can override it to use
cluster network based on an operators preferences.

Story: 2006490
Task: 36439

Change-Id: Ia235d4e9542bd9242f9d2713ad1e67870f3016e2
Signed-off-by: zhipengl <zhipengs.liu@intel.com>

nova/templates/deployment-novncproxy.yaml

@@ -52,8 +52,10 @@ spec:
 {{ tuple $envAll "nova" "novnc-proxy" | include "helm-toolkit.snippets.kubernetes_pod_anti_affinity" | indent 8 }}
       nodeSelector:
         {{ .Values.labels.novncproxy.node_selector_key }}: {{ .Values.labels.novncproxy.node_selector_value }}
+{{- if .Values.pod.useHostNetwork.novncproxy }}
       hostNetwork: true
       dnsPolicy: ClusterFirstWithHostNet
+{{- end }}
       initContainers:
 {{ tuple $envAll "novncproxy" $mounts_nova_novncproxy_init | include "helm-toolkit.snippets.kubernetes_entrypoint_init_container" | indent 8 }}
         - name: nova-novncproxy-init

nova/values.yaml

@@ -2277,6 +2277,8 @@ pod:
       nova_db_sync:
         volumeMounts:
         volumes:
+  useHostNetwork:
+    novncproxy: true
   replicas:
     api_metadata: 1
     compute_ironic: 1