errors: don't rekey on primitive type

If an error is thrown before a module is loaded, we attempt to cache
source map against error object, rather than module object. We
can't do this if the error is a primitive type

Fixes #38945

PR-URL: https://github.com/nodejs/node/pull/39025


Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>