Update the quickstart.sql

Summary:
Ref T1191. Use `storage quickstart` to regenerate `quickstart.sql` using modern schema construction statements.

This puts new installs into utf8mb4 mode immediately without requiring storage adjustment.

Test Plan:
  - Ran `arc unit --everything`, which uses quickstart.
  - Ran `bin/storage upgrade --namespace temp`, to quickstart a new namespace.
  - Ran `bin/storage upgrade --namespace temp --disable-utf8mb4`, to quickstart a new namespace without utf8mb4 support.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T1191

Differential Revision: https://secure.phabricator.com/D10797