util: add prototype support for boxed primitives

This makes sure manipulated prototypes from boxed primitives will
be highlighted. It also makes sure that a potential `Symbol.toStringTag`
is taken into account.

PR-URL: https://github.com/nodejs/node/pull/27351


Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: John-David Dalton <john.david.dalton@gmail.com>
Reviewed-By: Anto Aravinth <anto.aravinth.cse@gmail.com>