Ensure that `defaultLoad` does not uselessly access the file system to
get the source of modules that are known to be in CommonJS format.
This allows CommonJS imports to resolve in the current phase of the
event loop.
Refs: https://github.com/eslint/eslint/pull/17683
PR-URL: https://github.com/nodejs/node/pull/50465
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
