VSD - [FE] adding "Usage overview" panel"

What does this MR do and why?

This MR adds a usage overview visualization for the top level group. This visualization is only available in the analytics dashboard VSD.

Known issues

• The scrollbars are currently appearing on visualization panels, this will need deeper investigation
• We will need to further investigate for the responsive layout
• The chart appears at the project level too, given we have a separate feature flag this should be ok

Screenshots or screen recordings

Before - without FF	Before - with FF	After - without FF	After - with FF

How to set up and validate locally

Enable the :group_analytics_dashboard_dynamic_vsd feature flag

Feature.enable(:group_analytics_dashboard_dynamic_vsd)

1. Make sure you have an ultimate license
2. Invoke the seed script: FILTER=vsd_overview_counts bundle exec rake db:seed_fu
3. Verify that count records are created in the console: Analytics::ValueStreamDashboard::Count.count
4. From the left sidebar, click the Analyze > Application analytics link (Not Analytics dashboards)
5. The group dashboard list should appear, select Value Stream Dashboard (should be the only option)

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #386842 (closed)