Add "Data management" admin sidebar menu

What does this MR do and why?

Add Admin > Monitoring > Data management sidebar menu item.

References

Related to #572730 (closed)

Screenshots or screen recordings

Before	After
Screen_Recording_2025-09-30_at_3.34.35_PM	Screen_Recording_2025-09-30_at_3.34.56_PM

How to set up and validate locally

1. Ensure that you have EE license on your instance.
2. Go to /rails/features and enable the geo_primary_verification_view feature flag.
3. Go to /admin and click Monitorng > Data management

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.