Add testcase for kubeadm_patches

tests/files/packet_ubuntu24-calico-etcd-datastore.yml

@@ -27,3 +27,20 @@ containerd_registries_mirrors:
         skip_verify: true
 
 calico_datastore: "etcd"
+
+# Test kubeadm patches
+kubeadm_patches:
+  - target: kube-apiserver
+    patch:
+      metadata:
+        annotations:
+          example.com/test: "true"
+        labels:
+          example.com/prod_level: "prep"
+  - target: kube-controller-manager
+    patch:
+      metadata:
+        annotations:
+          example.com/test: "false"
+        labels:
+          example.com/prod_level: "prep"