Update caching keys for prebuild-core (#52565)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/52565

When we implemented caching in prebuilds for RN core for iOS, we were naïve in choosing the cache key. The current cache key does not consider the source code that is built and this can be problematic.
Imagine a contributor that changes a file in a React folder in their PR, but CI reuses a binary created from `main` and so everything will work well in CI even if the change contains an error.

This change globs over the header and implementation files in the React, ReactCommon and Libraries folder to ensure that we rebuild the code when iOS code changes.

## Changelog:
[Internal] -

Reviewed By: cortinico

Differential Revision: D78161427

fbshipit-source-id: e612b76232308835eb88c3776122bebd1316f751