fdo#72520 : Added embedded data of docx file to InteropGrabBag.

   - Added embedded exel sheet data for charts to grab bag.

Change-Id: I7f52b56de2306671fea9247c8a789c0e2a5a8874
Reviewed-on: https://gerrit.libreoffice.org/7211
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Miklos Vajna <vmiklos@collabora.co.uk>