check when unit test does not run or does not select any test

[jkone27]

would be good to have a yellow warning at least in estafette (instead of green)

if unit tests are not found correctly for some misconfiguration or casing issue, also maybe the extension should be case insensitive in grepping unit test classes

Starting estafette-extension-dotnet version 0.1.195... branch=main buildDate=2023-11-16T13:45:46Z goVersion=go1.20.11 os=linux revision=54dbf0f855848a865f11a5ef6e4efc09be711894
Solution name: Travix.FAQ
Running tests for projects ending with UnitTests in the ./test folder...