Portal-Hive client-interop fixes

[ScottyPoi]

This PR will bring the portal hive client interop tests to 100% 98% passing.

• new ENR's are added to routing table by general packet handler
  • Previously this was only available in the SYN packet handling.
• findENR functions now use getWithPending, which will return the peerId of peers still in the discv5 pending buffer.
• Corrections made to uTP sockets:
  • sndId / rcvId / connectionId setup
  • seqNr / ackNr setup
  • FIN handling.
    • Corrected to await end of stream before compiling.
• Added debug logging throughout.

[ScottyPoi]

Currently 1/73 tests failing: OFFER: Receipt trin --> ultralight

Should be fixable on Ultralight side. The failure has to do with FIN packet handling, and the fact that Trin uTP data packets tend to arrive in an out of order pattern, with the FIN arriving before the final 2 data packets.

Ultralight's uTP should know to wait for all data packets before compiling the stream, but the current solution for that is insufficient.

Personally in favor of merging this PR to update the public Portal-Hive tests. The fix for above can be done in a new PR.

[acolytec3]

LGTM