Merge branch 'bwill/add-cvss-to-api' into 'master'

Add CVSS data to vulnerabilities GraphQL API

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/143736



Merged-by: Piotr Skorupa <pskorupa@gitlab.com>
Approved-by: Russell Dickenson <rdickenson@gitlab.com>
Approved-by: Michał Zając <mzajac@gitlab.com>
Approved-by: Piotr Skorupa <pskorupa@gitlab.com>
Co-authored-by: Brian Williams <bwilliams@gitlab.com>