[consensus/simplex] Make Vote Emission in Activity Optional

[patrick-ogrady]

Many people won't need this and this requires clones and mailbox stuffing

[patrick-ogrady]

Doesn't actually hit the marshal loop but still a waste if not necessary:

monorepo/consensus/src/marshal/core/mailbox.rs

Lines 399 to 409 in 116798d

	async fn report(&mut self, activity: Self::Activity) {
	let message = match activity {
	Activity::Notarization(notarization) => Message::Notarization { notarization },
	Activity::Finalization(finalization) => Message::Finalization { finalization },
	_ => {
	// Ignore other activity types
	return;
	}
	};
	self.sender.send_lossy(message).await;
	}