When the Dart VM is not found within 10 minutes in CI on CoreDevices (iOS 17+), stop the app and upload the logs from DerivedData. The app has to be stopped first since the logs are not put in DerivedData until it's stopped.

Also, rearranged some logic to have CoreDevice have its own function for Dart VM url discovery.

Debugging for https://github.com/flutter/flutter/issues/142448.