Add tests for CMake helper ParseAndAddTests.cmake

[NeroBurner]

Description
Add test cases checking the ParseAndAddTests.cmake test case parsing

Additional context

Possible implementation mentioned in #2056 (comment)

I'd go with having a separate CMake project that uses the parser for a known source file, and a Python script that first configures the project, and then runs ctest -N and checks that the output lists all tests.

[NeroBurner]

maybe obsolete if ParseAndAddTests.cmake is removed #2092 (comment)