Make tracking agreements simple with our new Compliance Dashboard

Introduces the Compliance Dashboard as a new feature in GitLab 12.8. The initial iteration provides an aggregate view of approved merge requests across projects and groups, showing title, approver, and approval time. It also allows for visualization and export of data for audit trails and compliance reporting. Future iterations are planned to include merge request approval settings, security scanning data with each deploy, specific test results with each deploy, pipeline results, and an overview of compliance policies.