ci : use ninja and fix caching for windows-cublas #2910
Merged
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This commit updates the windows-cublas job to use Ninja as the build system instead of msbuild/msvc.
The motivation for this is that msbuild/mscv does not seem to handle ccache/sccache well, for example it ignores the
CMAKE_C_COMPILER_LAUNCHERetc. variables. But using Ninja as the build caching works and the build is initially the same speed as it is currently (without caching) subsequently builds are much faster.