Create state dump even if unexpected error occurs

[JulianGCalderon]

If a transaction fails unexpectedly, then a state dump is not generated:

starknet-replay/replay/src/main.rs

Lines 282 to 285 in e125989

	Err(error_reason) => {
	error!("execution failed unexpectedly: {}", error_reason);
	return;
	}

If native fails unexpectedly while the VM does not, then the delta_state_dumps.sh script will not detect this (as one of the files is missing).

I think we should create a file anyway, containing the error message, just so that there is a file to compare with. This can help find easy-to-miss errors.