Rapids Shuffle - UcpListener

[abellina]

Use UcpListener to connect to peers instead of our own connection. This will enable us to exchange the socket address to communicate with UCX. UCX keeps the connection alive, which allows it detect peer disconnection, which should help with reliability of the rapids shuffle.

This also removes TCP code that was added to exchange UCX's WorkerAddress, so it should end up cleaning code required for this exchange.

[abellina]

@petro-rudenko has a PR for this already, we need to follow up with removal of management port.