FindCUDAConf on windows

[galabovaa]

This only affects -DCUPDLP_FIND_CUDA=ON.
For all of our test setups CUPDLP_FIND_CUDA was not required at all on Windows.
I modified it anyway, just in case there are problems with the default CMake find CUDA on Windows, possibly Windows server since CUPDLP_FIND_CUDA was required for linux servers.
Users should set -DCMAKE_CUDA_PATH="..." when configuring CMake if they use -DCUPDLP_FIND_CUDA=ON

[galabovaa]

I see one more bazel tsan failure meaning I have more work there.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.06%. Comparing base (87fe0a3) to head (e9c99c3).
Report is 16 commits behind head on latest.

Additional details and impacted files

@@            Coverage Diff             @@
##           latest    #2339      +/-   ##
==========================================
- Coverage   79.29%   79.06%   -0.23%     
==========================================
  Files         345      345              
  Lines       84375    84387      +12     
==========================================
- Hits        66907    66723     -184     
- Misses      17468    17664     +196     

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[jajhall]

I can believe that WIN32 and CUDA aren't things we want to combine, and otherwise you're just adding places to look

So, looks fine to me

[galabovaa]

WIN32 in cmake is just checking for Windows, including Win64 😅

I didn't even think to disable it on 32bit platforms yet :D

On Windows, ENV{CUDA_HOME} is not propagating as expected but if CMAKE_CUDA_PATH is set it works fine.

Thank you! Merging this