fix: adds ami details for nodeadm configs (#1334)

**What problem does this PR solve?**:
adds details required for al 2023 

**Which issue(s) this PR fixes**:
stacked on #1332 

**How Has This Been Tested?**:
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Author: faiq

charts/cluster-api-runtime-extensions-nutanix/defaultclusterclasses/eks-cluster-class.yaml

@@ -73,6 +73,11 @@ metadata:
 spec:
   template:
     spec:
+      ami:
+        eksLookupType: AmazonLinux2023
+      instanceMetadataOptions:
+        httpPutResponseHopLimit: 2
+        httpTokens: required
       instanceType: PLACEHOLDER
       sshKeyName: ""
 ---

hack/examples/bases/eks/clusterclass/clusterclass.yaml

@@ -58,7 +58,12 @@ metadata:
   name: "quick-start-worker-machinetemplate"
 spec:
   template:
-    spec: {}
+    spec:
+      ami:
+        eksLookupType: AmazonLinux2023
+      instanceMetadataOptions:
+        httpTokens: required
+        httpPutResponseHopLimit: 2
 ---
 apiVersion: bootstrap.cluster.x-k8s.io/v1beta2
 kind: NodeadmConfigTemplate