Tenable deduplication setting and advance unittests for issue 9612

[manuel-sommer]

see issue #9612

I observed with this retest that the deuplication setting is not good enough for Tenable. Thus, I fixed this as well.

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[mtesauro]

Someone asked about using description in the dedup algorithm for Tenable, here's why:

Tenable parser aggregates finding by endpoint, and appends the description of the new finding to the original: CSV: https://github.com/DefectDojo/django-DefectDojo/blob/2181c61ef50f7b11d63f4612c1064fec89770760/dojo/tools/tenable/csv_format.py#L157C2-L161C59 XML: https://github.com/DefectDojo/django-DefectDojo/blob/2181c61ef50f7b11d63f4612c1064fec89770760/dojo/tools/tenable/xml_format.py#L226C1-L228C71