dotnet conversions result in errors "unable to find package" because it does not set up using a relative path

[brandonpollack23]

This results in an error before SDK generation and so conversions from terraform to csharp are broken.

Hint: The error is likely in the pulumi-language-dotnet implementation of GenerateProject which seems to check for all the dependencies to exist and if not errors. Other languages simply generate the project and that gets filled in afterwards.