Move "scripts/sql/probe.php" to "bin/storage probe"

Summary: This makes it namespace/database/connection aware and a little easier to find. Also use pht() / PhutilConsole.

Test Plan: Ran `bin/storage probe`.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Differential Revision: https://secure.phabricator.com/D6341