refactor: move React DevTools hook injections to DevAppContainer (#41360)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/41360

Changelog: [Internal]

This is Flipper-only, React DevTools inject these internals in `connectToDevTools` call

Mostly for 2 reasons:
- For React DevTools' hook being accessed only in one place (AppContainer-dev)
- This logic is not related to Inspector itself

Reviewed By: GijsWeterings

Differential Revision: D50559547

fbshipit-source-id: 2127f3a20b71261858fdfc004a372d1d95ced164