Pipeline Test to ensure Library/Tool nupkg are consumable

[gfs]

We hit an issue where we could pass all our tests and successfully build a nupkg that no one could use. We should add a test to each of our projects in the build that checks that the result objects are consumable as nupkgs.

Tools you can test with dotnet tool install https://docs.microsoft.com/en-us/dotnet/core/tools/dotnet-tool-install

Libraries you can test with dotnet add https://docs.microsoft.com/en-us/dotnet/core/tools/dotnet-add-package