Ensure that pod security policy is enabled for Azure Kubernetes Cluster

Disabling pod security policy in Azure Kubernetes Cluster may lead to unauthorized access.

The Pod Security feature was removed from Kubernetes and is no longer available in AKS.

In Terraform -
In Provider versions prior to 2.x (deprecated):

1. In the azurerm_kubernetes_cluster resource, add a network_profile block.
2. Set the field network_profile.network_policy field to either azure or calico.

References:
https://kubernetes.io/docs/concepts/security/pod-security-policy/
https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/kubernetes_cluster
https://registry.terraform.io/providers/hashicorp/azurerm/1.44.0/docs/resources/kubernetes_cluster#enable_pod_security_policy