Allow overriding open, write, and close when using createReadStream()
and createWriteStream().
PR-URL: https://github.com/nodejs/node/pull/29083
Refs: https://github.com/nodejs/node/issues/29050
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Rich Trott <rtrott@gmail.com>
