src: prefer internal fields in ModuleWrap

Use internal fields instead of `v8::Global`s where possible, since
they generally come with lower overhead and it’s much harder to
introduce memory leaks with them.

PR-URL: https://github.com/nodejs/node/pull/34470


Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Guy Bedford <guybedford@gmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: David Carlier <devnexen@gmail.com>
Reviewed-By: Franziska Hinkelmann <franziska.hinkelmann@gmail.com>