Fix potential Docker apt repository signed-by conflict on Debian-based systems

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/2999
Related to https://github.com/geerlingguy/ansible-role-docker/pull/410

roles/custom/matrix_playbook_migration/tasks/debian_docker_signedby_migration.yml

@@ -0,0 +1,6 @@
+---
+
+- name: Remove old Docker apt repository, potentially lacking signed-by option
+  ansible.builtin.file:
+    path: "{{ matrix_playbook_migration_debian_signedby_migration_repository_path }}"
+    state: absent

roles/custom/matrix_playbook_migration/tasks/main.yml

@@ -6,6 +6,15 @@
   block:
     - ansible.builtin.include_tasks: "{{ role_path }}/tasks/validate_config.yml"
 
+- when: ansible_os_family == 'Debian' and matrix_playbook_migration_debian_signedby_migration_enabled | bool
+  tags:
+    - setup-all
+    - install-all
+    - setup-docker
+    - install-docker
+  block:
+    - ansible.builtin.include_tasks: "{{ role_path }}/tasks/debian_docker_signedby_migration.yml"
+
 - tags:
     - setup-all
     - install-all