nongnu: Add cuda-toolkit, cuda-dev and their packages.
* guix/import/cuda.scm (%cuda-updater): Add variable.
* nongnu/packages/nvidia.scm (cuda-cccl, cuda-cudart, cuda-cuobjdump,
cuda-cuxxfilt, cuda-cupti, cuda-gdb, libnvvm, cuda-nvcc,
cuda-nvml-dev, cuda-nvdisasm, cuda-nvprof, cuda-nvprune, cuda-nvrtc,
cuda-nvtx, cuda-opencl, cuda-profiler-api, cuda-sanitizer-api,
libcublas, libcufft, libcurand, libcusolver, libcusparse, libnvfatbin,
libnvjitlink, libnvjpeg, libnpp, cuda-toolkit, cuda-dev, nvidia-cudnn,
nvidia-cudnn-frontend, nvidia-nccl): Add variables.
* nonguix/build-system/cuda.scm (cuda-license, cuda-current-system,
cuda-module-url, guix-system->cuda-system, %cuda-build-system-modules,
cuda-build, cuda-build-system): Add variable.
* nonguix/build/binary-build-system.scm (autopatchelf): Add variable.
* nonguix/build/cuda-build-system.scm (cuda-build): Add variable.
* nonguix/build/utils.scm (install-static-output): Add variable.
* nongnu/packages/patches: Add necessary patches.
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