Optimize node template handling

ansible/roles/metacluster/tasks/staging.yml

@@ -15,7 +15,7 @@
 - name: Download node-template images
   ansible.builtin.uri:
     url: "{{ item.url }}"
-    dest: /opt/workloadcluster/node-templates/{{ item.name }}
-  loop: "{{ downstream.node_templates }}"
+    dest: /opt/workloadcluster/node-templates/{{ downstream.node_templates.prefix }}{{ item.name }}
+  loop: "{{ downstream.node_templates.images }}"
   loop_control:
-    label: "{{ item.name }}"
+    label: "{{ downstream.node_templates.prefix }}{{ item.name }}"

ansible/vars/workloadcluster.yml

@@ -1,5 +1,7 @@
 downstream:
 
   node_templates:
-    - url: https://stable.release.flatcar-linux.net/amd64-usr/3227.2.0/flatcar_production_vmware_ova.ova
-      name: flatcar.ova
+    prefix: NodeTmpl_
+    images:
+      - url: https://stable.release.flatcar-linux.net/amd64-usr/3227.2.0/flatcar_production_vmware_ova.ova
+        name: flatcar.ova