Implement SatieUnitTest.runAll

This MR simplified ci/run_script.scd by removing the list of tests and replacing it with SatieUnitTest.runAll. This new class method runs all tests that are subclasses of SatieUnitTest. We no longer need to manually maintain an up-to-date list of tests inside this CI script.

Also, I've removed some files which contained older tests that were not run as part of the CI. The tests that these files included are covered in some of the newer UnitTests.