Fix static linking for Bridgeless mode (#43846)

Summary:
Working with gabrieldonadel, we realized that static frameworks of the React-RendererRuntime are not following the proper folder structure.
When a user tries to import `ReactCommon/RCTHost` in the app delegate, for example, the user ends up with an error and they can't find the files.

These changes fixes this by establishing the right folder structure in the static frameworks

## Changelog:
[Internal] - Make sure that React-RuntimeCore and JSErrorHandler are created with the proper structure for static frameworks

Pull Request resolved: https://github.com/facebook/react-native/pull/43846

Test Plan:
Tested locally on an app with 0.74.
Before: it failed to build.
After: it build successfully.

Reviewed By: cortinico

Differential Revision: D55741581

Pulled By: cipolleschi

fbshipit-source-id: 11ac0882d3feea05ef8904d55856ba5704b7a3b8