Vulnerability view doesn't show file location

Summary

We are not showing the file information on the new vulnerability view. ee/app/views/projects/security/dashboard/show.html.haml will need to change to show this. There will also need to be backend changes to properly expose this information. Ideally, we could call something like @vulnerability.finding.blob_path, but that doesn't work without additional changes.

Screenhots

On the left, we can see the new details view for the vulnerability and see that it does not have file information, and on the right, we see the modal popup for the corresponding finding does have the file, the line number, and it is properly linked.