Add some more spelling corrections to Spelling linter

Summary: Fixes T6773. See also the shameful `PhabricatorDestructableInterface` debacle.

Test Plan: go go dictionary power

Reviewers: btrahan, chad

Reviewed By: chad

Subscribers: epriestley

Maniphest Tasks: T6773

Differential Revision: https://secure.phabricator.com/D11033