Summary:
Factor out the action to build hermesc for apple platform so we can reuse it across jobs

## Changelog:
[Internal] - Factor out hermesC apple to reuse code

Pull Request resolved: https://github.com/facebook/react-native/pull/45346

Test Plan: GHA are green

Reviewed By: cortinico

Differential Revision: D59521564

Pulled By: cipolleschi

fbshipit-source-id: c99966e314b3d418d1d83d653c0be68b2931b03b