[lib] Compare only entities from one keyserver when checking the inconsistencies

Summary:
We don't want to report inconsistencies when there are entities from different keyserver - only the ones from a keyserver performing state check should be compared.

https://linear.app/comm/issue/ENG-3915/refactor-generating-a-response-to-serverrequesttypescheck-state

Depends on D11182

Test Plan: Tests

Reviewers: michal, atul, inka, kamil

Reviewed By: atul

Subscribers: ashoat

Differential Revision: https://phab.comm.dev/D11183