Qt6 test failures
There are a few test failures with Qt6 that need investigated.
VTK::GUISupportQtCxx-TestQtDebugLeaksView
VTK::GUISupportQtQuickCxx-TestQQuickVTKRenderItem
VTK::GUISupportQtQuickCxx-TestQQuickVTKRenderItemWidget
VTK::GUISupportQtQuickCxx-TestQQuickVTKRenderWindow
Cc: @john-stone @mwestphal @sankhesh
They have been excluded here: !10089 (merged)
Edited by Mathieu Westphal (Kitware)