Geo Primary Verification: Add feature flag

Why are we doing this work

This change will implement the feature flag geo_primary_verification_view

We are building a view for customers to manage their instance's data and verify primary data integrity for Geo Improve primary verification experience (&16554)

This feature flag will be used to develop the views and API iteratively.

Relevant links

• Epic: &16554

Implementation plan

1. Create new feature flag at ee/config/feature_flags/wip/geo_primary_verification_view.yml with relevant information

---
name: geo_primary_verification_view
feature_issue_url: https://gitlab.com/groups/gitlab-org/-/epics/16554
introduced_by_url: ISSUE_URL
rollout_issue_url: ISSUE_URL
milestone: '${MILESTONE}'
group: group::geo
type: wip
default_enabled: false