Allow "bin/repository thaw" to accept "--all-repositories" instead of a list of repositories
Summary:
Ref T13222. See PHI992. If you've lost an entire cluster (or have lost a device and are willing to make broad assumptions about the state the device was in) you currently have to `xargs` to thaw everything or do something else creative.
Since this workflow is broadly reasonable, provide an easier way to accomplish the goal.
Test Plan:
- Ran with `--all-repositories`, a list of repositories, both (error) and neither (error).
- Saw a helpful new list of affected repositories.
Reviewers: amckinley
Reviewed By: amckinley
Maniphest Tasks: T13222
Differential Revision: https://secure.phabricator.com/D19849