Fixes #2081. Clipboard unit tests sometimes fail with WSL.

[BDisp]

Fixes #2081 - I also included a json configuration file to allowing debugging unit tests on Linux with the VS 2022.

Pull Request checklist:

• I've named my PR in the form of "Fixes #issue. Terse description."
• My code follows the style guidelines of Terminal.Gui - if you use Visual Studio, hit CTRL-K-D to automatically reformat your files before committing.
• My code follows the Terminal.Gui library design guidelines
• I ran dotnet test before commit
• I have made corresponding changes to the API documentation (using /// style comments)
• My changes generate no new warnings
• I have checked my code and corrected any poor grammar or misspellings
• I conducted basic QA to assure all features are working

[tig]

We need to document what testenvironments.json is for and why. Thanks.

[tig]

May also fix #1618

[BDisp]

We need to document what testenvironments.json is for and why. Thanks.

Here is some documentation https://learn.microsoft.com/en-us/visualstudio/test/remote-testing?view=vs-2022. It's still in experimental preview.

Here a screenshot of the VS2022 where are the test. Much more reliable and faster than VSCode .

[tig]

@BDisp can you please add some comments in the code, at a logical place, that documents this for future contributors? (e.g. an XML comment in the .sln file?)

[BDisp]

@BDisp can you please add some comments in the code, at a logical place, that documents this for future contributors? (e.g. an XML comment in the .sln file?)

Thanks @tig. I ended for add the comments in the testenvironments.json file itself because normally no one read the comments in the solution.