Until WFCORE-6728 lands in full WildFly giving us the ability to reload a test server to a different stability level, to test preview stability features in standard WildFly we'll need to use manualmode tests. For WFLY-19062 we are going to add a preview feature to standard WildFly 32 Beta, and WFCORE-6728 may not be available in time for that. So convert the existing test to manualmode.

We'll use testsuite/preview/manualmode for this step, and then the WFLY-19062 PR itself will move the test to testsuite/integration/manualmode.