VCIO-next: Advisory model migration Batch 3

[TG1999]

[keshav-space]

• Completed in Add ArchLinux AdvisoryV2 importer pipeline #1942 and Add v2 pipeline for importing Red Hat advisories #1971

To test this:
Set up Vulnerablecode on your system locally and run new V2 importer pipeline for example:

• ./manage.py import redhat_importer_v2
• ./manage.py import archlinux_importer_v2