Add compliance center for premium customers

What does this MR do and why?

This MR moves group_level_compliance_dashboard feature to Premium tier as requested by Add Compliance Center for Premium (#461496 - closed) Since adherence and violations reports should be not available for this tier we are introducing two new features and update tests accordingly:

• group_level_compliance_adherence_report
• group_level_compliance_violations_report

Screenshots or screen recordings

Screenshot of compliance center for premium group

Note:

• adherence and violations frameworks tabs are missing
• no export for adherence and violations reports

How to set up and validate locally

• set GITLAB_SIMULATE_SAAS=1 and restart your gdk
• go to admin area and set any group to Premium subscription
• observe Secure > Compliance center

Related issues:

• Add Compliance Center for Premium (#461496 - closed)
• Review and update permissions for compliance ce... (#463139 - closed)