docker_compose(role): use community.docker.docker_compose_v2 module

Use the community.docker.docker_compose_v2 module as it supports proper
changed handling out of the box, making the roles code more
straightforward and work. Also just do a docker compose restart instead
of having the custom docker compose reload script.

https://docs.ansible.com/ansible/latest/collections/community/docker/docker_compose_v2_module.html

roles/docker_compose/defaults/main.yaml

@@ -1,2 +1 @@
 docker_compose__configuration_files: [ ]
-docker_compose__restart_cmd: ""