Update to libp2p-0.23. (#6870)

* Update to libp2p-0.23.

Thereby incorporate bandwidth measurement along the
lines previously done by libp2p itself.

* Tweak dependencies for wasm32 compilation.

For wasm32 we need to enable unstable features to
make `task::Builder::local` available.

* Simplify dependencies.

* Simplify.

Leave the calculation of bytes sent/received per second
to the outer layers of the code, subject to their own
individual update intervals.

* Cleanup

* Re-add lost dev dependency.

* Avoid division by zero.

* Remove redundant metric.

* Enable sending of noise legacy handshakes.

* Add comment about monotonic gauge.

* CI

substrate/client/network/src/network_state.rs

@@ -43,10 +43,10 @@ pub struct NetworkState {
 	pub connected_peers: HashMap<String, Peer>,
 	/// List of node that we know of but that we're not connected to.
 	pub not_connected_peers: HashMap<String, NotConnectedPeer>,
-	/// Downloaded bytes per second averaged over the past few seconds.
-	pub average_download_per_sec: u64,
-	/// Uploaded bytes per second averaged over the past few seconds.
-	pub average_upload_per_sec: u64,
+	/// The total number of bytes received.
+	pub total_bytes_inbound: u64,
+	/// The total number of bytes sent.
+	pub total_bytes_outbound: u64,
 	/// State of the peerset manager.
 	pub peerset: serde_json::Value,
 }