Add group dashboard tab

What does this MR do and why?

This MR adds initial version of group dashboard in compliance center

References

• Group dashboard tab (#544654 - closed)
• Group dashboard - framework coverage (#543947 - closed)

Screenshots or screen recordings

https://www.youtube.com/watch?v=vFZiYrmWk90

How to set up and validate locally

1. Enable feature via Feature.enable(:compliance_group_dashboard) in rails console
2. Run FILTER=compliance_report_data SEED_COMPLIANCE_REPORT_DATA=1 bundle exec rake db:seed_fu
3. It will report new group seeded
4. Open seeded group, go to Secure ➡️ Compliance center and observe new dashboard

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.

Related to #544654 (closed)