stream: refactor Writable buffering

Refactors buffering in Writable to use an array
instead of a linked list.

PR-URL: https://github.com/nodejs/node/pull/31046


Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Denys Otrishko <shishugi@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>