Move bitswap to its own crate (#12242)

* Introduce `sc-network-bitswap`

Move the bitswap protocol out of `sc-network` to its own crate.

* Improve test coverage

* Remove mention of bitswap from `sc-network`

* Fix documentation

* Fix clippy and remove the void dependency

* Remove unneeded trait bound and bump prost to 0.11

substrate/client/network/src/config.rs

@@ -31,7 +31,7 @@ pub use sc_network_common::{
 
 pub use libp2p::{build_multiaddr, core::PublicKey, identity};
 
-use crate::{bitswap::Bitswap, ExHashT};
+use crate::ExHashT;
 
 use core::{fmt, iter};
 use futures::future;
@@ -79,9 +79,6 @@ where
 	/// Client that contains the blockchain.
 	pub chain: Arc<Client>,
 
-	/// Bitswap block request protocol implementation.
-	pub bitswap: Option<Bitswap<B>>,
-
 	/// Pool of transactions.
 	///
 	/// The network worker will fetch transactions from this object in order to propagate them on
@@ -139,6 +136,9 @@ where
 
 	/// Optional warp sync protocol config.
 	pub warp_sync_protocol_config: Option<RequestResponseConfig>,
+
+	/// Request response protocol configurations
+	pub request_response_protocol_configs: Vec<RequestResponseConfig>,
 }
 
 /// Role of the local node.