Automatically discover CUDA and HIP in configure.py

configure.py should be able to discover CUDA and HIP by default, and enable corresponding components, if SDKs are available. In addition to that, `--cuda` and `--hip` options should provide three modes: auto (described above, default), on - attempt to build CUDA or HIP unconditionally, hard fail if SDKs are not found, off - do not build CUDA or HIP (even if SDKs are available).