narrow scope of _correct_for_mysql_bugs_88718_96365

narrow scope of _correct_for_mysql_bugs_88718_96365

Narrowed the scope of the internal workaround for MySQL bugs `#88718
<https://bugs.mysql.com/bug.php?id=88718>`_ and `#96365
<https://bugs.mysql.com/bug.php?id=96365>`_ so that it is only applied
where needed: MySQL 8.0.1 through 8.0.13 (where bug 88718 is present), and
on systems with ``lower_case_table_names=2`` (where bug 96365 applies,
typically macOS).  Previously the workaround was applied unconditionally
for all MySQL 8.0+ versions, which caused a ``KeyError`` during foreign key
reflection when the database user lacked SELECT privileges on referred
tables.

Fixes: #13243
Change-Id: I7c29f67d1653c5cd32f29e098f038fea1d56117b
(cherry picked from commit 530e1f71e74263ee9e23245071af2557aa65d425)