fdo#60698: Merge hatchwindowfactory into svt

They are used at same conditions, and hatchwindowfactory just have
four files, so we don'y have any reason to keep them separated.

Change-Id: Iae3bb26ab1e95a309bf0d83c4ef17a0bf0261179
Reviewed-on: https://gerrit.libreoffice.org/6811
Tested-by: LibreOffice gerrit bot <gerrit@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>