add PodSecurityPolicy removal note in docs

kubernetes/resource_kubernetes_pod_security_policy.go

@@ -373,6 +373,34 @@ func resourceKubernetesPodSecurityPolicyCreate(ctx context.Context, d *schema.Re
 		return diag.FromErr(err)
 	}
 
+	sv, err := serverVersionGreaterThanOrEqual(conn, "1.25.0")
+	if err != nil {
+		return diag.FromErr(err)
+	}
+	if sv {
+		return diag.Diagnostics{
+			diag.Diagnostic{
+				Severity: diag.Error,
+				Summary:  `"PodSecurityPolicy" was removed for Kubernetes v1.25.0 and above`,
+				Detail:   `Starting from version 1.25.0 Kubernetes has removed PodSecurityPolicy entirely, leading to this resource being left empty.`,
+			},
+		}
+	}
+
+	sv, err = serverVersionGreaterThanOrEqual(conn, "1.21.0")
+	if err != nil {
+		return diag.FromErr(err)
+	}
+	if sv {
+		return diag.Diagnostics{
+			diag.Diagnostic{
+				Severity: diag.Warning,
+				Summary:  `"PodSecurityPolicy" was deprecated in Kubernetes v1.21.0`,
+				Detail:   `Starting from version 1.21.0 Kubernetes has deprecated PodSecurityPolicy and has removed it entirely in v1.25.0`,
+			},
+		}
+	}
+
 	metadata := expandMetadata(d.Get("metadata").([]interface{}))
 	spec, err := expandPodSecurityPolicySpec(d.Get("spec").([]interface{}))
 

website/docs/r/pod_security_policy.html.markdown

@@ -10,6 +10,8 @@ description: |-
 
 A Pod Security Policy is a cluster-level resource that controls security sensitive aspects of the pod specification. The PodSecurityPolicy objects define a set of conditions that a pod must run with in order to be accepted into the system, as well as defaults for the related fields.
 
+~> NOTE: With the release of Kubernetes v1.25, PodSecurityPolicy has been removed. You can read more information about the removal of PodSecurityPolicy in the [Kubernetes 1.25 release notes](https://kubernetes.io/blog/2022/08/23/kubernetes-v1-25-release/#pod-security-changes).
+
 ## Example Usage
 
 ```hcl

website/docs/r/pod_security_policy_v1beta1.html.markdown

@@ -10,6 +10,8 @@ description: |-
 
 A Pod Security Policy is a cluster-level resource that controls security sensitive aspects of the pod specification. The PodSecurityPolicy objects define a set of conditions that a pod must run with in order to be accepted into the system, as well as defaults for the related fields.
 
+~> NOTE: With the release of Kubernetes v1.25, PodSecurityPolicy has been removed. You can read more information about the removal of PodSecurityPolicy in the [Kubernetes 1.25 release notes](https://kubernetes.io/blog/2022/08/23/kubernetes-v1-25-release/#pod-security-changes).
+
 ## Example Usage
 
 ```hcl