PodSecurityPolicy controller has been disabled on the Google Container Cluster. PodSecurityPolicy controller allows you to better control security of your pods.
Kubernetes has officially deprecated PodSecurityPolicy in version 1.21. PodSecurityPolicy will be removed in version 1.25.
In Terraform -
References:
https://registry.terraform.io/providers/hashicorp/google/3.78.0/docs/resources/container_cluster
https://cloud.google.com/kubernetes-engine/docs/how-to/pod-security-policies?hl=en