[lib] Convert infos to server as a part of a spec

Summary:
Move the logic to a spec and call it in a selector.

https://linear.app/comm/issue/ENG-4813/migrate-getclientresponsesselector-to-a-spec

Depends on D9025

Test Plan: Modify server state and check if state check fixes client state.

Reviewers: kamil, bartek, inka

Reviewed By: kamil, bartek

Subscribers: ashoat

Differential Revision: https://phab.comm.dev/D9030