stream: finished should error on errored stream

Calling finished before or after a stream has errored or closed
should end up with the same behavior.

PR-URL: https://github.com/nodejs/node/pull/39235


Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>