Update MySQL schema inspection code for deprecation of integer display widths

Summary:
Fixes T13536. See that task for discussion.

Older versions of MySQL (roughly, prior to 8.0.19) emit "int(10)" types. Newer versions emit "int" types. Accept these as equivalent.

Test Plan: Ran bin/storage upgrade --force against MySQL 8.0.11 and 8.0.20. Got clean adjustment lists on both versions.

Maniphest Tasks: T13536

Differential Revision: https://secure.phabricator.com/D21265