[ci] Add new fizz GitHub action

Copies the existing circleci workflow for checking the inlined Fizz
runtime into GitHub actions. I didn't remove the circleci job for now
just to check for parity.

ghstack-source-id: 09480b1a20fbdd374a6075e6ec02a07b6a516c56
Pull Request resolved: https://github.com/facebook/react/pull/30035