implement SV1 upstream logic for Message Generator

[plebhash]

Message Generator is currently unable to behave as an SV1 Upstream

we need a new setup_as_sv1_upstream function on utils/message-generator/src/net.rs

and then we need a new match arm here:

stratum/utils/message-generator/src/executor_sv1.rs

Lines 57 to 71 in 7841021

	match (test.as_dowstream, test.as_upstream) {
	(Some(as_down), None) => {
	let (recv_from_up, send_to_up) = setup_as_sv1_downstream(as_down.addr).await;
	Self {
	name: Arc::new(test_name.clone()),
	send_to_up: Some(send_to_up),
	recv_from_up: Some(recv_from_up),
	actions: test.sv1_actions.unwrap(),
	cleanup_commmands: test.cleanup_commmands,
	process,
	save,
	}
	}
	_ => unreachable!(),
	}

[pavlenex]

Should this be closed or added to #1077 ?