Now that we're hooked into CI, we need to enable running tests both locally and with helix. - [x] Add sample project for easy testing: https://github.com/dotnet/runtime/pull/33633 - [x] Generate .app per test suite w/ test runner - [x] Integrate w/ [xharness](https://github.com/dotnet/xharness) when it's ready to ensure we can get results out - [x] Modify the build so that we can run locally and send the right things to helix
Now that we're hooked into CI, we need to enable running tests both locally and with helix.