stream: allow calling callback before promise

Refs: https://github.com/nodejs/node/issues/39535

PR-URL: https://github.com/nodejs/node/pull/40772


Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>