Allow cross db mod for a geo service

Thong Kuahrequested to merge
allowlist_geo_repository_updated_service into master

What does this MR do and why?

This callsite has been causing a lot of noise on staging where Geo is enabled. Geo is not enabled on production, so this is something we can resolve later, for self-managed instances

We allowlist this callsite, and open #351271 (closed) for follow-up.

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