BinaryToolKit.csproj doesn't receive global properties

[ViktorHofer]

BinaryToolKit.csproj is invoked in a special way (through detect-binaries.sh) which results in global properties getting dropped. https://github.com/dotnet/dotnet/blob/8efffbde026eccfca4eed0b453380dd91993c824/eng/init-detect-binaries.proj#L19

Because of that, properties like DotNetBuildWithOnlineFeeds and DotNetBuildSourceOnly which are input to conditioning the use of NuGet Audit are missing.