Fix quickstart.sql for old MySQL

Summary:
Fixes T7422. After the recent fix for "sort" columns, we can end up with invalid SQL in some cases when running quickstart.

In particular, we do "COLLATE binary CHARACTER SET utf8_general_ci" (which is invalid).

Preprocess these so we get "COLLATE utf8 CHARACTER SET utf8_general_ci" (which is valid and correct).

Test Plan: Ran bin/storage upgrade -f --namespace blahblhbaba with and without --disable-utf8mb4.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T7422

Differential Revision: https://secure.phabricator.com/D11929