Silence the `eden info` output from react-native-codegen (#48540)

Summary:
We currently see this error message on console:
![Screenshot 2025-01-08 at 19 09 47](https://github.com/user-attachments/assets/3b384772-9abc-40a5-83b3-9b4ccce85f4a)

This will silence it by piping stderr to /dev/null

## Changelog:

[INTERNAL] - Silence the `eden info` output from react-native-codegen

Pull Request resolved: https://github.com/facebook/react-native/pull/48540

Test Plan: CI

Reviewed By: robhogan

Differential Revision: D67948411

Pulled By: cortinico

fbshipit-source-id: f805634a65713f4f9bc2dce6d781664e7564bc96