Add unit tests to check the various features

[CZEMacLeod]

The debug attach system will probably not be possible to test like this, but the other samples and packages should be able to at least have an integration test.

Package	Comment
C3D.Extensions.Aspire.IISExpress	IIS Express launch only - debugger features not possible to add tests
C3D.Extensions.Aspire.OutputWatcher
C3D.Extensions.VisualStudioDebug	Using debugger / visual studio
C3D.Extensions.Aspire.VisualStudioDebug	Using debugger / visual studio
C3D.Extensions.Aspire.WaitForOutput
C3D.Extensions.SystemWeb.OpenTelemetry.Application

Sample	Comment
EF6
Legacy
SimpleMVC
SWA	Added basic tests in #14
NodeJS	Using debugger / visual studio
Python	Not in this repo and using debugger / visual studio
WaitForOutput	Added basic tests in #26

Test github action script in CZEMacLeod/gs-actions-iis-express-tests