buffer: mark pool ArrayBuffer as untransferable

This removes a footgun in which users could attempt to transfer the
pooled ArrayBuffer underlying a regular `Buffer`, which would lead to
all `Buffer`s that share the same pool being rendered unusable as well,
and potentially break creation of new pooled `Buffer`s.

This disables this kind of transfer.

Refs: https://github.com/nodejs/node/issues/32752

PR-URL: https://github.com/nodejs/node/pull/32759


Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: James M Snell <jasnell@gmail.com>