add value 'none' for networkPolicy field (#29653)

Author: robogatikov

specification/containerservice/resource-manager/Microsoft.ContainerService/aks/stable/2024-05-01/managedClusters.json

@@ -3639,6 +3639,7 @@
         "networkPolicy": {
           "type": "string",
           "enum": [
+            "none",
             "calico",
             "azure",
             "cilium"
@@ -3647,6 +3648,10 @@
             "name": "NetworkPolicy",
             "modelAsString": true,
             "values": [
+              {
+                "value": "none",
+                "description": "Network policies will not be enforced. This is the default value when NetworkPolicy is not specified."
+              },
               {
                 "value": "calico",
                 "description": "Use Calico network policies. See [differences between Azure and Calico policies](https://docs.microsoft.com/azure/aks/use-network-policies#differences-between-azure-and-calico-policies-and-their-capabilities) for more information."