* Remove internal forwarding modules for /lib/
* Add *Entry suffix to all entry points
* Don't bundle ReactNativeFeatureFlags since it's shimmed
* Delete TestRendererStack
* Switch tests at forwarding modules rather than via Jest
* Share mocks between regular and equivalence fixtures
* Rename environment flag to be more generic
* Remove accidental variable name change
* Minor naming changes for consistency
Files that have two versions get the engine in variable name.