Convert arc tasks to use PhutilConsoleTable.

Summary: PhutilConsoleTable does a better job at aligning columns. We still probably need to do some work to PhutilConsoleTable to set a maximum width for a specified column, or elect which columns can be truncated etc but this can probably come later.

Test Plan:

Reviewers: epriestley, Blessed Reviewers

Reviewed By: epriestley, Blessed Reviewers

Subscribers: epriestley, Korvin

Differential Revision: https://secure.phabricator.com/D9601