Add Experimental QUIC support (#4577)

## Issue Addressed

#4402 

## Proposed Changes

This PR adds QUIC support to Lighthouse. As this is not officially spec'd this will only work between lighthouse <-> lighthouse connections. We attempt a QUIC connection (if the node advertises it) and if it fails we fallback to TCP. 

This should be a backwards compatible modification. We want to test this functionality on live networks to observe any improvements in bandwidth/latency.

NOTE: This also removes the websockets transport as I believe no one is really using it. It should be mentioned in our release however.


Co-authored-by: João Oliveira <hello@jxs.pt>

beacon_node/lighthouse_network/Cargo.toml

@@ -44,12 +44,13 @@ prometheus-client = "0.21.0"
 unused_port = { path = "../../common/unused_port" }
 delay_map = "0.3.0"
 void = "1"
+libp2p-quic= { version = "0.9.2", features=["tokio"]}
 libp2p-mplex = "0.40.0"
 
 [dependencies.libp2p]
 version = "0.52"
 default-features = false
-features = ["websocket", "identify", "yamux", "noise", "gossipsub", "dns", "tcp", "tokio", "plaintext", "secp256k1", "macros", "ecdsa"]
+features = ["identify", "yamux", "noise", "gossipsub", "dns", "tcp", "tokio", "plaintext", "secp256k1", "macros", "ecdsa"]
 
 [dev-dependencies]
 slog-term = "2.6.0"
@@ -59,6 +60,3 @@ exit-future = "0.2.0"
 void = "1"
 quickcheck = "0.9.2"
 quickcheck_macros = "0.9.1"
-
-[features]
-libp2p-websocket = []