Add more selectors to existing "bin/worker" commands
Summary:
Ref T13591. Add more selector flags to let "bin/worker" commands operate on tasks by container PHID, object PHID, priority, etc.
This anticipates adding "bin/worker reprioritize" and "bin/worker delay" workflows, to provide more tools for handling repository imports.
Test Plan:
- Ran `bin/worker execute`, `cancel`, `retry`, and `free` with various sets of selector flags.
- Used `--min-priority`, `--max-priority`, `--object`, `--container`, `--archived`, `--max-failure-count` to select tasks.
- Specified invalid, duplicate, aliased objects with "--object".
- Specified invalid range priority selectors.
Maniphest Tasks: T13591
Differential Revision: https://secure.phabricator.com/D21534