DOCX Export of 'Table Row Redline' (like insert row or delete row)

This patch adds support in the DOCX exporter for exporting the
'table row redlines', such as 'inserted a table row',
or 'removed a table row'.

Change-Id: If07e3496d8cab8b93b10c6ae3bcaec49369a8c2d
Reviewed-on: https://gerrit.libreoffice.org/7825
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Miklos Vajna <vmiklos@collabora.co.uk>