Make CircleCI run shallow clones of the React Native repo (#34438)
Make CircleCI run shallow clones of the React Native repo (#34438)

Summary:
## Changelog
[General][Changed] - Change all instance of `checkout` to shallow checkout with a default `--depth` value of 1.
Keep booleans fully lowercase `true`, `false`.

Pull Request resolved: https://github.com/facebook/react-native/pull/34438

Reviewed By: cipolleschi

Differential Revision: D38784506

Pulled By: throwaway-fishery

fbshipit-source-id: 679f25219d9099da1cb0c5b6cff6db6f48ab6f2e

facebook/react-native,javache/react-native,javache/react-native,javache/react-native,javache/react-native,javache/react-native,janicduplessis/react-native,janicduplessis/react-native,facebook/react-native,facebook/react-native,facebook/react-native,facebook/react-native,janicduplessis/react-native,janicduplessis/react-native,janicduplessis/react-native,facebook/react-native,javache/react-native,facebook/react-native,janicduplessis/react-native,javache/react-native,javache/react-native,facebook/react-native,janicduplessis/react-native,javache/react-native,janicduplessis/react-native,facebook/react-native