Support group filtering for Vulnerabilities API endpoint
Problem to solve
We should allow users to easily retrieve vulnerability occurrences by group from our API.
Intended users
Further details
Proposal
Add route for retrieving vulnerability occurrences by group and supporting :group_id: URL param within Vulnerability API.
Permissions and Security
No changes to permissions
Documentation
No changes to docs
Testing
Add tests to ensure retrieving all project vulnerability occurrences for shared group works as expected.
What does success look like, and how can we measure that?
Users are easily able to retrieve all vulnerability occurrences within a group.