Convert the "list<string>" and "list<regex>" Config option types

Summary: Ref T12845. This updates the "list<string>" and "list<regex>" options.

Test Plan: Set, deleted, and mangled options of these types from the web UI and CLI.

Reviewers: chad, amckinley

Reviewed By: amckinley

Maniphest Tasks: T12845

Differential Revision: https://secure.phabricator.com/D18157