Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/51991

This diff introduces a new parameter to customize libraryGenerators used in the codegen, since I'm adding a default object, this diff shoulnd't change any behavior

changelog: [internal] internal

Reviewed By: christophpurrer

Differential Revision: D76472495

fbshipit-source-id: 50b9095c7c554e368f65e4c0b5539be0cca51a51