[lib] Use specs to determine hash value for inner infos

Summary:
Choose the right spec and based on that an info and compute a hash for it.

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

Depends on D9031

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

Reviewers: kamil, bartek, inka

Reviewed By: kamil

Subscribers: ashoat

Differential Revision: https://phab.comm.dev/D9048