Integrate sending notification to discord (#50979)

Summary:
As part of the work to integrate libraries with our nightlies, we want to receive a message when the libraries are failing to build on discord. This will help us catch breaking changes early on and onboarding library maintainer as soon as possible.

## Changelog:
[Internal] - Integrate with Discord when nightly fails

Pull Request resolved: https://github.com/facebook/react-native/pull/50979

Test Plan: GHA

Reviewed By: cortinico

Differential Revision: D73845810

Pulled By: cipolleschi

fbshipit-source-id: c6cfdf16b29642b1c3ad3872096c0e815fa88a0a