Update libp2p (#2101)

This is a little bit of a tip-of-the-iceberg PR. It houses a lot of code changes in the libp2p dependency. 

This needs a bit of thorough testing before merging. 

The primary code changes are:
- General libp2p dependency update
- Gossipsub refactor to shift compression into gossipsub providing performance improvements and improved API for handling compression



Co-authored-by: Paul Hauner <paul@paulhauner.com>

beacon_node/eth2_libp2p/src/lib.rs

@@ -63,7 +63,6 @@ impl<'de> Deserialize<'de> for PeerIdSerialized {
 pub use crate::types::{error, Enr, GossipTopic, NetworkGlobals, PubsubMessage, SubnetDiscovery};
 pub use behaviour::{BehaviourEvent, Gossipsub, PeerRequestId, Request, Response};
 pub use config::Config as NetworkConfig;
-pub use config::{GossipsubConfig, GossipsubConfigBuilder, GossipsubMessage};
 pub use discovery::{CombinedKeyExt, EnrExt, Eth2Enr};
 pub use discv5;
 pub use libp2p::bandwidth::BandwidthSinks;