lib: add back lib/module.js redirection

The previous commit deleted lib/module.js so that git
recognize the file move `lib/module.js` ->
`lib/internal/modules/cjs/loader.js`. This commit add the
redirection back.

PR-URL: #19177
Refs: #19112
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>

lib/module.js

@@ -0,0 +1,3 @@
+'use strict';
+
+module.exports = require('internal/modules/cjs/loader');