Enable all test cases in windows pipeline

There is apparently one test case that freezes on Windows and lets the job time out after three hours.

The problem seems to be in test_falling_drop. I have tested the case locally and it only takes a few seconds to run. Furthermore, the test before test_drops_between_phases so I don't think the problem is the simulation itself. However, this test writes some images to a Temporary directory. Maybe the image writing causes the problem.

It seems like test_plot has the same problem since this test case would normally take under a second. So the problem is definitely caused by the plotting.