Refactor: Read interop flag directly from feature flags (#54973)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/54973

Read from react native feaure flags from within TurboModuleManager.

This makes it easier to call installJSIBindings. The caller doesn't have to read from feature flags beforehand.

Changelog: [Android][Breaking] Remove unstable_shouldEnableLegacyModuleInterop()

Reviewed By: christophpurrer

Differential Revision: D89709217

fbshipit-source-id: cd85bda30240380663c74f18971fd3fb74ec1e51