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.

templates/config/prod/messenger.yaml

@@ -2,6 +2,7 @@
 framework:
     messenger:
         transports:
+            {% if chill.rabbitmq_install +%}
             async:
                 dsn: '%env(RABBITMQ_URL)%/async'
                 options:
@@ -12,5 +13,9 @@ framework:
                         async: ~
                     auto_setup: true
             priority: '%env(RABBITMQ_URL)%/priority'
+            {% else +%}
+            async: 'doctrine://default'
+            priority: 'doctrine://default'
+            {% endif +%}
             failed: 'doctrine://default?queue_name=failed'
             sync: 'sync://'