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

requirements.yml

@@ -6,3 +6,6 @@ collections:
   - name: community.sops
     version: ">=2.2.4"
     source: https://galaxy.ansible.com
+  - name: community.docker
+    version: ">=5.0.0"
+    source: https://galaxy.ansible.com