Set RabbitMQ queues in HA mode (Mirrored queues)

[vincenzodnp]

Describe the bug
"By default, contents of a queue within a RabbitMQ cluster are located on a single node (the node on which the queue was declared)".
If for some reason, the pod where the queue is declared, dies, the RabbitMQ service become unavailable.

https://www.rabbitmq.com/ha.html
https://www.rabbitmq.com/clustering.html

To Reproduce
At the moment it is the default behavior

Expected behavior
Queues can be served by every pod of the broker Stateful Set.