Factor out build hermes Macos (#45371)

Summary:
Factor out the build-hermes-macos job to reuse the code

## Changelog:
[Internal] - Factor out build hermes macos action

Pull Request resolved: https://github.com/facebook/react-native/pull/45371

Test Plan: GHA are green

Reviewed By: blakef

Differential Revision: D59627977

Pulled By: cipolleschi

fbshipit-source-id: 84226d8a2c036f816fa8ea949b467873a7eef37c