BHoM_Engine_Tests: Test Explorer not running tests

[alelom]

Description:

Test explorer should be able to run tests, but the tests are not discovered. This is likely due to the modifications done to make the tests compatible with the CI/CD pipeline (BHoMBot).

Steps to reproduce:

Try running tests in the solution. The Text explorer hangs indefinitely, or ends abruptly complaining that no "suitable test to run" was found.

Expected behaviour:

Test should be findable and runnable from test explorer.