Remove hacky patches

[oskarth]

Problem

Currently there are two patches being applied to get basic interop with nim-libp2p. This is hacky and error prone.

Details

See patch folder.

1. WakuRelay should inherit from GossipSub, or similar. Not just overwrite codec.
2. Some error re signed peer record I'm not sure about, very ugly hack.

Likely requires making changes to nim-waku too, at least for 2.

A hint: I noticed that nim-waku doesn't appear to send all protocol info in identfiy string (requires TRACE logging).

Acceptance criteria

No patches needed.

[oskarth]

First step here would be to upstream issues here for nim-libp2p.