Skip test which resizes window with EGLFS

This test is resizing window, which is not supported in EGLFS,
so it needs to be skipped.

Pick-to: 6.7
Task-number: QTBUG-115777
Change-Id: Ie136f6565b4d466bc62c4e2ebe2337488b5003b4
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>

tests/auto/widgets/itemviews/qheaderview/tst_qheaderview.cpp

@@ -2198,6 +2198,9 @@ void tst_QHeaderView::preserveHiddenSectionWidth()
 
 void tst_QHeaderView::invisibleStretchLastSection()
 {
+    if (QGuiApplication::platformName().startsWith(QLatin1String("eglfs"), Qt::CaseInsensitive))
+        QSKIP("EGLFS does not allow resizing on top window");
+
     int count = 6;
     QStandardItemModel model(1, count);
     QHeaderView view(Qt::Horizontal);