Allow lint codes to be up to 128 bytes long

Summary:
Fixes T9145. We currently restrict lint codes to 32 bytes, but PHPCS generates codes like "PHPCS.E.PEAR.Comments.Messages.Line.TooLong".

These codes seem reasonable as codes, and we don't currently have any key-length problems or other technical concerns with simply raising the size of this column.

Test Plan: Ran bin/storage upgrade to pick up adjustments.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T9145

Differential Revision: https://secure.phabricator.com/D14166