PikaTransport: Add a `declare_queue` function

[Anthchirp]

Add a function that can generically create a queue. Parameters should include functionality to make a temporary or automatic deleting queue as well as a requested queue name. The function returns the actual queue name.

On StompTransport this can be a noop (or rather: string-return, ensuring a transient. prefix if the queue is temporary).
On PikaTransport this actually declares the queue, with the queue name potentially set by the server.