CI Win: current MSVC/CUDA 11.8 incompatibility workaroud

Workaround to current MSVC error with CUDA 11.8:
```
C:\Program Files\Microsoft Visual
Studio\2022\Community\VC\Tools\MSVC\14.41.34120\include\yvals_core.h(888):
error: static assertion failed with "error STL1002: Unexpected compiler
version, expected CUDA 12.4 or newer."
```

CUDA 11.8 is used for compatibility with CC 3.5 (Kepler) devices. The
support for those will however end in 5 days [1] so we may swich to CUDA
12.x later.

[1]: https://endoflife.date/nvidia-gpu

.github/scripts/Windows/prepare_msys.sh

@@ -9,7 +9,7 @@ export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig:/usr/local/share/pkgconfig:/usr/
 export LIBRARY_PATH=/usr/local/lib
 export INCLUDE='C:\msys64\clang64\include' # for MSVC (CUDA)
 export CUDA_FLAGS="--generate-code arch=compute_35,code=sm_35\
- -allow-unsupported-compiler"
+ -D_ALLOW_COMPILER_AND_STL_VERSION_MISMATCH -allow-unsupported-compiler"
 
 CUDA_D=$(ls -d /c/Program\ Files/NVIDIA\ GPU\ Computing\ Toolkit/CUDA/*)
 if test -d "$CUDA_D"; then