Move setup to build multiarch containers into dedicated role

This change moves the QEMU configuration for multiarch builds into a
dedicated role. Furthermore the execution will always be treated as
unchanged, unless an error occured!

main.yml

@@ -24,13 +24,10 @@
     tags: [packages]
   - role: roles/helm-diff
     tags: [packages]
+  - role: roles/multiarch-container-builds
+    tags: [packages]
   tasks:
   - name: Dump hostvars
     tags: [never, dump]
     debug:
       var: hostvars[inventory_hostname]
-  - name: Configure QEMU for multiarch podman builds
-    tags: [packages]
-    become: yes
-    shell: podman run --rm --privileged docker.io/multiarch/qemu-user-static --reset -p yes
-    when: ansible_os_family == 'Debian'

roles/multiarch-container-builds/tasks/main.yml

@@ -0,0 +1,5 @@
+- name: Ensure QEMU configuration for multiarch podman builds
+  become: yes
+  shell: podman run --rm --privileged docker.io/multiarch/qemu-user-static --reset -p yes
+  changed_when: False
+  when: ansible_os_family == 'Debian'