autobuild CI depends on "windows-latest" image, but fails because it expects Visual Studio 2022

[mcgroarty]

CI tests fail because we pull the windows-latest image, then look for Visual Studio 2022 specifically.

Options:

1. pin windows-2022 instead of windows-latest
2. automatically select the latest Visual Studio version installed on the runner image, rather than hard-coding a choice
3. test both the windows-2022 and windows-latest images in addition to implementing option 2
4. option 3, but fail with an explanatory error when encountering a toolchain with a newer major version number

I'm having AI attempt option 4.