repl: avoid deprecated require.extensions in tab completion

PR-URL: #58653
Fixes: #58641
Reviewed-By: Ethan Arrowood <[email protected]>
Reviewed-By: Dario Piotrowicz <[email protected]>
Reviewed-By: Marco Ippolito <[email protected]>
Reviewed-By: Juan José Arboleda <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>

Author: gulbaki

lib/repl.js

@@ -1338,7 +1338,7 @@ function complete(line, callback) {
     filter = completeOn;
     if (this.allowBlockingCompletions) {
       const subdir = match[2] || '';
-      const extensions = ObjectKeys(this.context.require.extensions);
+      const extensions = ObjectKeys(CJSModule._extensions);
       const indexes = ArrayPrototypeMap(extensions,
                                         (extension) => `index${extension}`);
       ArrayPrototypePush(indexes, 'package.json', 'index');