Split incus role from playbook

ansible/roles/system/handlers/main.yaml

@@ -0,0 +1,11 @@
+---
+- name: Reboot host
+  ansible.builtin.reboot:
+    msg: "Reboot initiated by Ansible"
+    connect_timeout: 5
+    reboot_timeout: 600
+    pre_reboot_delay: 0
+    post_reboot_delay: 30
+    test_command: whoami
+  become: true
+  when: reboot_required_file.stat.exists