Convert chart 3D scene illumination to .ui

Change-Id: I55e56196818e181d16e74ae93376ff4ff1c4c395
Reviewed-on: https://gerrit.libreoffice.org/6998
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>