fs: make fs_event_wrap binding internal

PR-URL: https://github.com/nodejs/node/pull/22480
Refs: https://github.com/nodejs/node/issues/22160


Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>