Add more core only (no WPF refs) tests to net6 slns pt3

[mjkkirschner]

Purpose

Adds the following test projects to the Net6 Solutions:

• ProtoTestConsoleRunner
• AnalysisTests
• DynamoUtilitiesTests
• GeometryColorTests
• PackageManagerTests

There is a failing test:
https://master-5.jenkins.autodesk.com/job/Dynamo/job/DynamoSelfServe/job/pullRequestValidation/9136/
but it's that strange native exception regarding loading the geometry bins, only seems to repro when tests run in parallel.

Declarations

Check these if you believe they are true

• The codebase is in a better state after this PR
• Is documented according to the standards
• The level of testing this PR includes is appropriate
• User facing strings, if any, are extracted into *.resx files
• All tests pass using the self-service CI.
• Snapshot of UI changes, if any.
• Changes to the API follow Semantic Versioning and are documented in the API Changes document.
• This PR modifies some build requirements and the readme is updated
• This PR contains no files larger than 50 MB

Release Notes

Adds 5 test assemblies to the net6 .slns

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[JimmySanchezGlobant]

@mjkkirschner Does it mean that System libraries are just called when the Target Framework is .NET 4.8? So, I can assume then that if the Target Framework is .NET 6 doesn't work or am I wrong?

[mjkkirschner]

I think these references are no longer required when targeting .net6 - I believe some of them have been moved to nuget packages - not system of course, but some of the other types have moved to different assemblies.

[aparajit-pratap]

Don't these references (LibG and Test.Sdk) need to be there for all targets? I see that they've been removed altogether, why?

[mjkkirschner]

thanks @aparajit-pratap - this looks like a mistake, I guess the tests still pass as other test assemblies bring those deps in - but I'll revert this deletion.