fix multi gpu setup

[humanx98]

This PR fixes two issues that prevent HIPRT from working correctly on multi-GPU setups:

1. An Orochi bug. A minimal fix is included here to make the root cause obvious, but the preferred upstream fix is the one from ioroDevice issue on multigpu system Orochi#135, which removes bit-field usage.
2. An issue in the rtip31Support check. The Compiler constructor is executed before the device is assigned, so the support check happens too early.