[healthcheck] Refactor checks into separate files
Makes it easier to extend later, if we want to add more checks. ghstack-source-id: 6fb3435555f1b988e1a185bfda8be9418eb622c5 Pull Request resolved: https://github.com/facebook/react-forget/pull/2924
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Sathya Gunsasekaran committed
4ce5c56fee9e960b8b0702dc114455cbfa5d4e95
Parent: c464445