In 6.0, bring forward 5.0 patch that removes MSBuild, Roslyn dependency on Microsoft.VisualStudio.Setup.Configuration.Interop non-OSS prebuilt

[dagood]

https://github.com/dotnet/source-build/blob/release/5.0/patches/msbuild/0006-Do-not-depend-on-Visual-Studio-in-source-build.patch

(net472 dotnet/msbuild source-build enabled by https://github.com/dotnet/source-build/blob/release/5.0/patches/msbuild/0005-Re-enable-full-fx-builds-in-source-build.patch in 5.0)

• For: Resolve prebuilts for the roslyn repo for 6.0 #2419 (prebuilt shows up here)
• Related: Resolve prebuilts for the msbuild repo for 6.0 #2417