Disabled std::runtime_error in getRegistersPerMultiprocessor

All kernels using this will have to be refucktored, because
__launch_bounds__ has different meaning in HIP than in CUDA. See [1] for
details.

[1]: https://rocmdocs.amd.com/en/latest/Programming_Guides/HIP-GUIDE.html#device-side-dynamic-global-memory-allocation