Make RabbitMQ integration optional in Chill configuration

Introduced a new `rabbitmq_install` variable to conditionally enable RabbitMQ components in `compose.yaml`, `messenger.yaml`, and `env_file.env`. Updated related Ansible tasks to respect this variable.

tasks/chill/main.yml

@@ -36,6 +36,7 @@
     dest: "{{ install_dir }}/{{ chill['chill_environment'] }}/rabbitmq.env"
     owner: "{{ as_user }}"
     mode: '0400'
+  when: chill.rabbitmq_install
 
 - name: Create directory for storing configuration
   ansible.builtin.file: