CUDA: Support nvcc symlinking to ccache

Rong Ourequested to merge
rongou/cmake:support-nvcc-ccache-symlink into master

Invoke nvcc -v foo to find the real CUDA bin directory. This is needed if nvcc is a symlink to ccache or colornvcc.

@trxcllnt @keith.j.kraus @brad.king

Fixes: #21177 (closed)
Topic-rename: cuda-nvcc-ccache-symlink

Edited by Rong Ou

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