Enable trace timings logs for transaction factory (#4845)

* Enable trace timings logs for transaction factory.

substrate/bin/node/cli/src/command.rs

@@ -56,6 +56,16 @@ where
 				_ => panic!("Factory is only supported for development and local testnet."),
 			}
 
+			// Setup tracing.
+			if let Some(tracing_targets) = cli_args.shared_params.tracing_targets.as_ref() {
+				let subscriber = sc_tracing::ProfilingSubscriber::new(
+					cli_args.shared_params.tracing_receiver.into(), tracing_targets
+				);
+				if let Err(e) = tracing::subscriber::set_global_default(subscriber) {
+					panic!("Unable to set global default subscriber {}", e);
+				}
+			}
+
 			let factory_state = FactoryState::new(
 				cli_args.mode.clone(),
 				cli_args.num,