[Github] Enable long paths in windows CI Container (#184224)
Otherwise we run into issues with file paths >260 characters. This was
preventing us from updating the Windows container as last time we built
the container it came with a MSVC supplied CMake update, which used
absolute paths in more places, bumping us over the limit.
https://github.com/ninja-build/ninja/issues/2400
https://gitlab.kitware.com/cmake/cmake/-/issues/22435