Avoids conflicts with the dinput tests somehow.
Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=52962
The dinput tests have been using that too for a long while without any known issues. It also makes the tests more robust to interruptions and IME have been able to get back to a working state after a test failed to properly uninstall devices.
(I've tried renaming dinput inf strings and files to something else but for some reason that's not enough and ntoskrnl.exe tests still fail on this call)