Add vulnerabilities over time panel and chart

What does this MR do and why?

Related #550168 (closed)

This adds a new vulnerabilities over time panel in the new project security dashboard. It also renames 2 files to make them group specific.

References

Screenshots or screen recordings

Before After
Screenshot_2025-07-14_at_14.11.45 Screenshot_2025-07-14_at_14.11.02

How to set up and validate locally

  1. Enable feature flag: http://gdk.test:3000/rails/features/project_security_dashboard_new
  2. Go to any project with vulnerabilities
  3. Go to Secure > Security Dashboard
  4. Validate it shows the mocked data in a vulnerabilities over time chart

MR acceptance checklist

Evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Edited by Lorenz van Herwaarden

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