[clang-tools-extra] [clang-tidy] Add documentation and smoke test for CUDA (PR #173699)

[via cfe-commits]

================

----------------
zeyi2 wrote:

Currently this file is a copy paste from `clang/test/CodeGenCUDA/Inputs/cuda.h`. I'll add proper credit to the original author soon.

https://github.com/llvm/llvm-project/pull/173699