fix: Add playbook scoped variable

ansible/roles/firstboot/files/ansible_payload/bootstrap/playbook.yml

@@ -2,6 +2,9 @@
 - hosts: 127.0.0.1
   connection: local
   gather_facts: true
+  vars:
+    # Needed by some templating in various tasks
+    _newline: "\n"
   vars_files:
     - defaults.yml
     - metacluster.yml

ansible/roles/firstboot/files/ansible_payload/bootstrap/roles/metacluster/tasks/authentication.yml

@@ -109,7 +109,6 @@
         state: present
         kubeconfig: "{{ kubeconfig.path }}"
       vars:
-        _newline: "\n"
         _template:
           name: "{{ item.name }}"
           namespace: "{{ item.namespace }}"

ansible/roles/firstboot/files/ansible_payload/bootstrap/roles/workloadcluster/tasks/gitops.yml

@@ -34,7 +34,6 @@
   vars:
     manifest: "{{ item.0 }}"
     src: "{{ item.1.src }}"
-    _newline: "\n"
     _template: "{{ item.1._template }}"
   loop: "{{ query('ansible.builtin.subelements', query('ansible.builtin.dict', downstream_components), 'value.extra_manifests') }}"
   loop_control: