Goals

See how much simpler we can make the load balancer by removing the routing protocol as well as forwarding responses for inbound forwarding requests

Implementation

• Remove the routing protocol, instead relying on a set peer config. (map of peer ID -> list of protocol IDs)
  • On peer connect, if peer is service node in the peer config, start listening on peers list of protocols, making the route "active"
  • On peer disconnect, if peer is service node in the peer config, stop listening on peers list of protocols
  • Makes code for both libp2p load balancer and service node much simpler, particularly service node (overall this PR has net 500 less LoC, which includes most complicated concurrency stuff - and that's without updatings tests, which will get shorter)
• Also remove forwarding response for inbound requests
  • not sure how big a win this really is -- just a few deletions as a result