Limit messages weight in batch (#496)

* limit messages in the batch by weight/count

* fixed components compilation

* reverted obsolete parts of #469

* implement generated_messages_weights

* actually use computed weight in message proof

* fmt and clippy

* fixed TODO

* clippy

* Update relays/messages-relay/src/message_race_loop.rs

Co-authored-by: Hernando Castano <HCastano@users.noreply.github.com>

* add issue reference

* add assert message

* grumbles

* fmt

* reexport weight from bp-message-lane

Co-authored-by: Hernando Castano <HCastano@users.noreply.github.com>
Co-authored-by: Hernando Castano <castano.ha@gmail.com>

bridges/relays/substrate-client/src/error.rs

@@ -36,6 +36,8 @@ pub enum Error {
 	ResponseParseFailed(codec::Error),
 	/// Account does not exist on the chain.
 	AccountDoesNotExist,
+	/// Custom logic error.
+	Custom(String),
 }
 
 impl From<WsNewDnsError> for Error {
@@ -69,6 +71,7 @@ impl ToString for Error {
 			Self::Request(e) => e.to_string(),
 			Self::ResponseParseFailed(e) => e.what().to_string(),
 			Self::AccountDoesNotExist => "Account does not exist on the chain".into(),
+			Self::Custom(e) => e.clone(),
 		}
 	}
 }