Revert "module: fix inconsistency between load and _findPath"

This reverts commit 1b92214d
from PR #22382.

See the discussion at
https://github.com/nodejs/citgm/issues/604

PR-URL: https://github.com/nodejs/node/pull/23228
Refs: https://github.com/nodejs/node/pull/22382
Fixes: https://github.com/nodejs/node/issues/4778


Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>