Geo: Verify uploads on secondaries

This is the next step for https://gitlab.com/gitlab-org/gitlab-ee/issues/7184.

Keep following the pattern set by project verification. Verify uploads on secondaries. Track results in geo_node_statuses.

We also need to:

• Merge the queries between the secondary and the primary and verify what is missing or not matching
• Adding missing information to the upload screen (columns, buttons) and tests for that

Need a mockup about what the screen changes are.

Acceptance criteria

• Uploads on secondaries can be manually verified against the primary
• New metric provided by Geo secondaries: Number of verified uploads
• New metric provided by Geo secondaries: Number of failed verification uploads