feat(helm): name prefix for nat gws

Author: SkalaNetworks

charts/kube-ovn/templates/natGw/vpc-nat-config.yaml

@@ -11,6 +11,9 @@ data:
   {{- with .Values.natGw.bgpSpeaker.apiNadProvider }}
   apiNadProvider: {{ tpl . $ }}
   {{- end }}
+  {{- with .Values.natGw.namePrefix }}
+  natGwNamePrefix: {{ . | quote }}
+  {{- end }}
 
 ---
 kind: ConfigMap

charts/kube-ovn/values.yaml

@@ -158,6 +158,10 @@ natGw:
     # -- Network attachment definition used to reach the API server when running on BGP mode
     # See https://kubeovn.github.io/docs/stable/en/advance/with-bgp/
     apiNadProvider: "{{ .Values.apiNad.name }}.{{ .Values.namespace }}.ovn"
+    # -- Prefix appended to the name of the NAT gateways when generating the Pods
+    # If this value is changed after NAT GWs have been provisioned, every NAT gateway will need to be
+    # manually destroyed and recreated.
+    namePrefix: "vpc-nat-gw"
 
 # -- API NetworkAttachmentDefinition to give some pods (CoreDNS, NAT GW) in custom VPCs access to the K8S API
 # This requires Multus to be installed