[lib] Pass isSocketConnected instead of connectionStatus to callServerEndpoint

Summary:
When connectionStatus cycles between disconnected and connecting, it causes callServerEndpoint to get regenerated, which results in every single action being regenerated as well.

However, in callServerEndpoint we actually only care if connectionStatus is connected or not. We can avoid all of these actions being regenerated by passing in some more specific information to callServerEndpoint.

This gets us closer to resolving ENG-3612. Some more details in this Linear comment.

However, this only solves the issue for the old-style useServerCall. useKeyserverCall is still broken because it has a harder task of caching the whole list of KeyserverInfos. The following diffs will resolve that.

Test Plan:
Before this stack, I was able to reproduce ENG-3612 by going to the ThreadSettings screen in native while my local keyserver was down. After this stack, the issue no longer repros.

I also compiled a release build of the iOS app to my phone to confirm that there were no regressions in TTI, or the time it takes to open a MessageList and go back to the ChatThreadList.

Reviewers: inka, rohan

Reviewed By: rohan

Subscribers: tomek

Differential Revision: https://phab.comm.dev/D10464