PDF export of PDF images: don't preserve annotations in general

Regression from 33c9bc0225a92f26770f9ef20b252af47853e7b9 (PDF export of
PDF images: preserve hyperlinks, 2022-01-07), the problem was that we
want to preserve hyperlinks, but annotations are added by the PDF export
explicitly, so it isn't a good idea to "preserve" them as well.

Fix the problem by going back to the old behavior, except when the
annotation sub-type is /Link.

This keeps hyperlinks working but doesn't lead to duplicated comments
when re-exporting an image + adding comments explicitly.

Conflicts:
vcl/qa/cppunit/pdfexport/pdfexport.cxx

Change-Id: I910990da59bdc1150cc346f1a5471cb6da55dd2c
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/131262
Tested-by: Aron Budea <aron.budea@collabora.com>
Reviewed-by: Andras Timar <andras.timar@collabora.com>

0 files changed, 0 insertions, 0 deletions