Add "--pool" and "--duration" flags to daemon CLI tools
Summary: Ref T12331. These changes are intended to make it easier to debug T12331 since I'm having difficulty reproducing the issue locally.
Test Plan:
- Ran bin/phd debug task --pool 4 and got an autoscaling pool.
- Ran bin/worker flood --duration 3 and got some 3-second-long tasks to execute with bin/worker execute ....
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T12331
Differential Revision: https://secure.phabricator.com/D17431