Update MySQL schema inspection code for deprecation of integer display widths
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