Bump minimum Node.js version to 22 (#56887)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/56887

Drop support for Node.js 20. The minimum supported version is now `^22.13.0 || ^24.3.0 || >= 26.0.0`.

Node.js 20 reached end-of-life in April 2026 and is no longer actively maintained. This aligns React Native with the upcoming Metro requirement.

Changelog:
[General][Breaking] - Require Node.js >= 22.13.0

Reviewed By: christophpurrer, cortinico

Differential Revision: D105685641

fbshipit-source-id: f490e5a13e4289daba98c4d56dd8fdd341aef0db