[lib] Refactor baseReducer

Summary:
issue: https://linear.app/comm/issue/ENG-5348/refactor-basereducer
We want to check this condition for every keyserver. See D1066 for context on what this code does

Test Plan: Tested that iff not connected, the inner ifs are run

Reviewers: michal, kamil, ginsu

Reviewed By: michal

Subscribers: ashoat, tomek

Differential Revision: https://phab.comm.dev/D9915