Fix build-framework-ios CI job (#2996)

Summary:
As titled. `build_apple_frameworks.sh` is copying all the exported headers out and in #2934 `//executorch/schema:program` is being moved to `exported_deps` and causing `build_apple_frameworks.sh` to not able to copy generated headers `program_generated.h` and `scalar_type_generated.h`.

This PR fixes it by moving it back to `deps`.

Pull Request resolved: https://github.com/pytorch/executorch/pull/2996

Reviewed By: kirklandsign

Differential Revision: D56028952

Pulled By: larryliu0820

fbshipit-source-id: 2cd4999154877b0ac7b49cd1f54d518cba34b2f2