Skip a test that uses QProcess instead of blacklisting it.
Re-enable this test in CMakeLists.txt, so that it can be checked
in the CI.
Fixes: QTBUG-87431
Pick-to: 6.3 6.2
Change-Id: If8a4acd60735f355dffa60c28b8d07695ee33ec8
Reviewed-by: Assam Boudjelthia <assam.boudjelthia@qt.io>