Update the GET /v1/vulnerability API and frontend to allow for filtering only vulnerabilities that affect catalogued projects

[janjwerner-confluent]

Current Behavior

The API GET /v1/vulnerability Returns a list of all vulnerabilities.
Likewise the frontend http://localhost:8080/vulnerabilities URL returns all known vulnerabilities.

Proposed Behavior

The API GET /v1/vulnerability accepts optional parameter and / or
that allows to retrieve only the vulnerabilities affecting projects or vulnerabilities affecting >= affectedProjectCount projects.

Likewise, the frontend for vulnerabilities could have a toggle < Active Vulnerabilities> that would filter out the vulnerabilities not present in the catalogued projects. .

Checklist

• I have read and understand the contributing guidelines
• I have checked the existing issues for whether this enhancement was already requested

[tdhammer]

+1

On the frontend, I think a sort capability on the project count column might also be useful.

[rkg-mm]

I think this request is obsolete with PR #2472, especially the tab shown in the second screenshot provides this functionality