Decrease the peer reputation on invalid block requests (#8260)

* Decrease the peer reputation on invalid block requests

This pr changes the block request handler to decrease the reputation of
peers when they send the same request multiple times or they send us an
invalid block request.

* Review feedback

* Change log target

* Remove unused code

substrate/client/network/test/src/lib.rs

@@ -727,7 +727,11 @@ pub trait TestNetFactory: Sized {
 		let protocol_id = ProtocolId::from("test-protocol-name");
 
 		let block_request_protocol_config = {
-			let (handler, protocol_config) = BlockRequestHandler::new(&protocol_id, client.clone());
+			let (handler, protocol_config) = BlockRequestHandler::new(
+				&protocol_id,
+				client.clone(),
+				50,
+			);
 			self.spawn_task(handler.run().boxed());
 			protocol_config
 		};