Resolves: fdo#74284 use AccessibleRole::PANEL for VclBoxes under windows

(cherry picked from commit 685ec1899435037205d98a102a32ca8b6a4836d0)

Change-Id: Ic8c743c2646c8610b3d90425024413b40dfdab13
Reviewed-on: https://gerrit.libreoffice.org/8105
Reviewed-by: Michael Meeks <michael.meeks@collabora.com>
Reviewed-by: Michael Stahl <mstahl@redhat.com>
Reviewed-by: Kohei Yoshida <libreoffice@kohei.us>
Tested-by: Kohei Yoshida <libreoffice@kohei.us>
(cherry picked from commit 47ff82608b065c3c0d98557583bb822b20fb4081)