Super Stream Builder for usability

[kurenchuksergey]

Hi. I am really happy that rabbitmq now supports something similar to Kafka and I can forget about my own bicycles.

From the documentation, seems it is possible to set log retention configuration
Expected Behavior:
it is possible to setup x-max-age and other things in a SuperStream declaration

Current Behavior:
It is possible through other abstraction Queues. Or it is not possible at all

I will attach the pull request

[kurenchuksergey]

maybe it is also important to cover
x-initial-cluster-size