Allow forge script --unlocked without --sender

[adhusson]

Component

Forge

Describe the feature you would like

Running simulation scripts against anvil instances would be easier if --unlocked without --sender was OK. You would use whatever the sender gets resolved to for each broadcast(...).

Here:

foundry/cli/src/cmd/forge/script/broadcast.rs

Lines 45 to 55 in dedc31e

	let mut senders = HashSet::from([self
	.evm_opts
	.sender
	.wrap_err("--sender must be set with --unlocked")?]);
	// also take all additional senders that where set manually via broadcast
	senders.extend(
	deployment_sequence
	.typed_transactions()
	.iter()
	.filter_map(|(_, tx)| tx.from().copied()),
	);

Additional context

No response