Check if moving the .NET SDK install dir to the D drive on Windows makes the builds faster (OSOE-928)

[Piedone]

See actions/setup-dotnet#260 (comment).

Jira issue

[Piedone]

Results: Measurements.xlsx

The NuGetTest workflows got about 11% slower, but with a much larger standard deviation, so I'm not entirely sure how much to trust this (given that workflows get basically random VMs). But we need to use this hardware anyway.

The root workflows got 6% faster on average, but there the original runtime had a larger standard deviation.

I'm not confident that anything really changed here.

[Piedone]

Also setting NUGET_PACKAGES to the D drive as suggested under actions/setup-dotnet#260 (comment) helped a lot:

OSOCE measurements.xlsx

This caused an about 14% reduction in total workflow runtime for the root solution, and 25% for the NuGetTest one.

The root solution build, compared to the larger 8-core runners, takes 18,5% more, but not 38,5% as before. I'm inclined to switch our builds over to that, since it's free.