Query daemons across all hosts with `./bin/phd status --all`.

Summary: This was previously submitted as D9497, but I had accidentally `arc land`ed some not-reviewed not-yet-complete changes in addition to the accepted diff.

Test Plan: Same as D9497.

Reviewers: epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: epriestley, Korvin

Maniphest Tasks: T5388, T4209

Differential Revision: https://secure.phabricator.com/D9589