fs: make process.binding('fs') internal

Refs: https://github.com/nodejs/node/issues/22160

PR-URL: https://github.com/nodejs/node/pull/22478


Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Denys Otrishko <shishugi@gmail.com>