Determine routing approach for REST API

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About

We will have a routing and topology layer as part of Cells, that will help route requests to the correct Cell. See https://handbook.gitlab.com/handbook/engineering/architecture/design-documents/cells/http_routing_service/.

Problem

Do standalone REST API's https://docs.gitlab.com/ee/api/api_resources.html#standalone-resources fall outside of the Cell routing service's ability to route?

Proposed solution

See #458363 (comment 2526439298)

Edited by 🤖 GitLab Bot 🤖