Hard-to-follow logging when NuGet package misrepresents its dependencies

### Steps to reproduce

Use a NuGet package that declares a package dependency on an older version of a package than the actual assembly reference in the package. For instance:

[lying-nuget-package.zip](https://github.com/microsoft/msbuild/files/3632278/lying-nuget-package.zip)

### Expected behavior

A clear, actionable error describing the conflict.

### Actual behavior

```
There was a conflict between "StreamJsonRpc, Version=2.1.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" and "StreamJsonRpc, Version=2.2.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a". (TaskId:18)
"StreamJsonRpc, Version=2.1.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" was chosen because it was primary and "StreamJsonRpc, Version=2.2.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" was not. (TaskId:18)
References which depend on "StreamJsonRpc, Version=2.1.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" [C:\Users\raines\.nuget\packages\streamjsonrpc\2.1.55\lib\netstandard2.0\StreamJsonRpc.dll]. (TaskId:18)
C:\Users\raines\.nuget\packages\streamjsonrpc\2.1.55\lib\netstandard2.0\StreamJsonRpc.dll (TaskId:18)
Project file item includes which caused reference "C:\Users\raines\.nuget\packages\streamjsonrpc\2.1.55\lib\netstandard2.0\StreamJsonRpc.dll". (TaskId:18)
C:\Users\raines\.nuget\packages\streamjsonrpc\2.1.55\lib\netstandard2.0\StreamJsonRpc.dll (TaskId:18)
References which depend on "StreamJsonRpc, Version=2.2.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" []. (TaskId:18)
C:\Users\raines\.nuget\packages\microsoft.visualstudio.utilities\16.4.29317.144\lib\net46\Microsoft.VisualStudio.Utilities.dll (TaskId:18)
Project file item includes which caused reference "C:\Users\raines\.nuget\packages\microsoft.visualstudio.utilities\16.4.29317.144\lib\net46\Microsoft.VisualStudio.Utilities.dll". (TaskId:18)
C:\Users\raines\.nuget\packages\microsoft.visualstudio.utilities\16.4.29317.144\lib\net46\Microsoft.VisualStudio.Utilities.dll (TaskId:18)
...
C:\Program Files (x86)\Microsoft Visual Studio\2019\Preview\MSBuild\Current\Bin\Microsoft.Common.CurrentVersion.targets(2106,5): warning MSB3277: Found conflicts between different versions of "StreamJsonRpc" that could not be resolved. These reference conflicts are listed in the build log when log verbosity is set to detailed. [S:\work\lying-nuget-package\lying-nuget-package.csproj]
```

It's not clear why those paths are relevant, since they came in through NuGet package references.