fix `print-packages` script (#55019)

Summary:
Running `print-packages` script from monorepo root results in a require error.

This PR updates the import path for `getPackages` utit to fix the script, which now output correct data.

## Changelog:

[INTERNAL] [FIXED] - Fix `print-packages` script

Pull Request resolved: https://github.com/facebook/react-native/pull/55019

Test Plan: <img width="1344" height="602" alt="Screenshot 2026-01-02 at 19 58 51" src="https://github.com/user-attachments/assets/d6dd1ab5-e0da-4878-b622-7e5f5aa0865b" />

Reviewed By: cipolleschi

Differential Revision: D90104112

Pulled By: cortinico

fbshipit-source-id: a44115bf44725eaa8935568706981fe6a3826940