[CMake] Introduce QMC_GPU cmake option

[ye-luo]

Proposed changes

Replace ENABLE_CUDA, ENABLE_ROCM, QMC_CUDA2HIP, ENABLE_SYCL and ENABLE_OFFLOAD CMake options with a single user facing option QMC_GPU proposed in #5250

    QMC_GPU               Semicolon-separated list of GPU features to build (openmp,cuda,hip,sycl).
                          "openmp", "cuda", "hip" and "sycl" for GPU acceleration via OpenMP offload, CUDA, HIP and SYCL.
                          Recommended values: "openmp;cuda" for NVIDIA, "openmp;hip" for AMD, "openmp;sycl" for Intel.
                          Its default value is set to the recommended value if QMC_GPU_ARCHS indicates a specific vendor
                          or left empty otherwise.
    QMC_GPU_ARCHS         Specify GPU architectures. For example, "gfx90a" targets AMD MI200 series GPUs.
                          "intel_gpu_pvc" targets Intel Data Center GPU Max 1xxx.
                          "sm_80;sm_70" creates a single executable running on both NVIDIA A100 and V100 GPUs.
                          Mixing vendor "gfx90a;sm_70" is not supported. If not set, atempt to derive it
                          from CMAKE_CUDA_ARCHITECTURES or CMAKE_HIP_ARCHITECTURES if available and then
                          atempt to auto-detect existing GPUs.

What type(s) of changes does this code introduce?

• Build related changes

Does this introduce a breaking change?

• yes

What systems has this change been tested on?

epyc-server

Checklist

• Yes. This PR is up to date with current the current state of 'develop'

[ye-luo]

Test this please

[prckent]

Thanks Ye.

While updating these config options, can you document USE_OBJECT_TARGET ? It is only mentioned in the CMakeLists.txt

Once this is in and working we should review and update the recipes in config/ to use QMC_GPU.

[ye-luo]

@prckent USE_OBJECT_TARGET has been documented. I also added auto setting QMC_GPU based on QMC_GPU_ARCHS.

[prckent]

Worth mentioning in https://github.com/QMCPACK/qmcpack/blob/develop/CHANGELOG.md

[prckent]

Test this please

[prckent]

Test this please