autotests: Fix TestXdgShellWindow in Qt 6 build
TestXdgShellWindow::testPointerInputTransform() compares QVariant(QPointF) with QPoint. While this works in Qt 5, Qt 6 seems to take the type into account when comparing the two.
TestXdgShellWindow::testPointerInputTransform() compares QVariant(QPointF) with QPoint. While this works in Qt 5, Qt 6 seems to take the type into account when comparing the two.