Move top-level Cycle Analytics to the group level

What does this MR do?

This change moves Value Stream Analytics from the global analytics space (https://gitlab.com/-/analytics/value_stream_analytics) to the group level.

The change is behind a feature flag: group_level_cycle_analytics

To try it locally, enable it in the console: Feature.enable(:group_level_cycle_analytics)

Related issue: #196455 (closed)

The follow up MR will contain the changelog entry (turn the FF default on).

The old views and controllers will be cleaned up once the feature flag is eliminated. #202094 (closed)

Screenshots

Before

After

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• Tested in all supported browsers
• Informed Infrastructure department of a default or new setting change, if applicable per definition of done

Security

If this MR contains changes to processing or storing of credentials or tokens, authorization and authentication methods and other items described in the security review guidelines:

• Label as security and @ mention @gitlab-com/gl-security/appsec
• The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
• Security reports checked/validated by a reviewer from the AppSec team

Related #196455 (closed)