Move qopenglwidget example to manual tests

Pick-to: 6.5
Change-Id: I76e6377008484a7b17c65e3c03139a0fb2fc5c34
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>

examples/opengl/CMakeLists.txt

@@ -7,7 +7,6 @@ if(TARGET Qt6::Widgets)
     qt_internal_add_example(contextinfo)
     qt_internal_add_example(2dpainting)
     qt_internal_add_example(hellogl2)
-    qt_internal_add_example(qopenglwidget)
     qt_internal_add_example(cube)
     qt_internal_add_example(textures)
     qt_internal_add_example(stereoqopenglwidget)

examples/opengl/opengl.pro

@@ -7,7 +7,6 @@ qtHaveModule(widgets) {
     SUBDIRS += contextinfo \
                2dpainting \
                hellogl2 \
-               qopenglwidget \
                cube \
                textures \
                stereoqopenglwidget