Add Workstation upgrade test to update tests
    
    Since we set up this whole process to run upgrade tests for
    updates to run the FreeIPA ones on the Server base image, it
    should be easy to also run Workstation upgrade tests on the
    Workstation base image. So let's do that! Let's do the most
    complex test only, the encrypted upgrade one.
    
    Signed-off-by: Adam Williamson <awilliam@redhat.com>