Dependency List - View vulnerability

Steps

This could extend https://gitlab.com/gitlab-org/gitlab/-/blob/master/qa/qa/specs/features/ee/browser_ui/secure/security_reports_spec.rb#L133

1. Log into GitLab
2. Populate Dependency List (see existing spec above)
3. Click a vulnerability
4. Verify vulnerability details

To follow on gitlab-org&4506 (closed)