Generates the supplement_data.go table embedded in
vuls-data-update/pkg/extract/fortinet/cvrf/ (MaineK00n/vuls-data-update#892):
affected-product data for the historical Fortinet CVRF advisories (2012-2022)
whose product_statuses/product_tree are empty upstream.
Sources: the legacy curated handmade dataset (vulsio/vuls-data-raw-fortinet)
and Fortinet's CNA records in cvelistV5 (containers.cna.affected,
assignerShortName: fortinet only). Per advisory the sources merge at