Merge branch '399119-read-vuln-permissions' into 'master'

Add ability to read_vulnerability to custom roles

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/120704



Merged-by: Kassio Borges <kborges@gitlab.com>
Approved-by: Kassio Borges <kborges@gitlab.com>
Reviewed-by: Jarka Košanová <jarka@gitlab.com>
Reviewed-by: Kassio Borges <kborges@gitlab.com>
Co-authored-by: Jarka Košanová <jarka@gitlab.com>