Use Apple perf workflow to validate the test spec (#5293)

Summary:
This PR has 2 fixes:

* Use Apple perf workflow to validate the iOS test spec in the same way that we are doing for Android spec
* I also attempt to fix this concurrency deadlock when running the upload test spec workflow in trunk https://github.com/pytorch/executorch/actions/runs/10820832880.  This can only be tested once the PR lands though

Pull Request resolved: https://github.com/pytorch/executorch/pull/5293

Reviewed By: shoumikhin

Differential Revision: D62539566

Pulled By: huydhn

fbshipit-source-id: fc9eb14b3ea235102d2a6e8a5c9f74e3fb9ad75a