Libp2p v0.48.0 upgrade (#3547)

## Issue Addressed

Upgrades libp2p to v.0.47.0. This is the compilation of
- [x] #3495 
- [x] #3497 
- [x] #3491 
- [x] #3546 
- [x] #3553 

Co-authored-by: Age Manning <Age@AgeManning.com>

beacon_node/lighthouse_network/src/discovery/enr_ext.rs

@@ -232,7 +232,6 @@ impl CombinedKeyExt for CombinedKey {
                         .expect("libp2p key must be valid");
                 Ok(CombinedKey::from(ed_keypair))
             }
-            _ => Err("ENR: Unsupported libp2p key type"),
         }
     }
 }
@@ -266,7 +265,6 @@ pub fn peer_id_to_node_id(peer_id: &PeerId) -> Result<discv5::enr::NodeId, Strin
             hasher.finalize(&mut output);
             Ok(discv5::enr::NodeId::parse(&output).expect("Must be correct length"))
         }
-        _ => Err("Unsupported public key".into()),
     }
 }