Remove obsolete script to install CUDA SDK under host_injections

[trz42]

After #772 we don't need the script /cvmfs/software.eessi.io/versions/2023.06/scripts/gpu_support/nvidia/install_cuda_host_injections.sh any longer. It is replaced with /cvmfs/software.eessi.io/versions/2023.06/scripts/gpu_support/nvidia/install_cuda_and_libraries.sh. Thus, it should be removed and the documentation for GPU support should be updated accordingly (using the new script). See also documentation issue EESSI/docs#327

[ocaisa]

Rather than a removal, maybe we just make a wrapper that calls the other script with the appropriate options to get the same end result