Remove clusterName property from pod details

This property has been removed in the latest versions of the k8s spec and has always been unsettable and defaulted to a blank string. See: https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.24.md#deprecation:~:text=%40knight42)-,The%20metadata.clusterName%20field%20is%20deprecated.%20This%20field%20has%20always%20been,are%20found%20before%20complete%20removal.%20(%23108717%2C%20%40lavalamp),-VSphere%20releases%20less

This field is also not used by the plugin.

Author: JamesMcNee

src/main/java/cd/go/contrib/elasticagent/model/reports/agent/KubernetesPodDetails.java

@@ -9,8 +9,8 @@
 import static java.text.MessageFormat.format;
 
 public class KubernetesPodDetails {
+
     private String name;
-    private String clusterName;
     private String nodeName;
     private String namespace;
     private String createdAt;
@@ -24,7 +24,6 @@ public static KubernetesPodDetails fromPod(Pod pod) {
         KubernetesPodDetails podDetails = new KubernetesPodDetails();
 
         podDetails.name = pod.getMetadata().getName();
-        podDetails.clusterName = pod.getMetadata().getClusterName();
         podDetails.nodeName = pod.getSpec().getNodeName();
         podDetails.namespace = pod.getMetadata().getNamespace();
 
@@ -50,10 +49,6 @@ public String getName() {
         return name;
     }
 
-    public String getClusterName() {
-        return clusterName;
-    }
-
     public String getNodeName() {
         return nodeName;
     }