[email protected]: use default MySQL character set/collation

[methane]

ref: #220821

• Have you followed the guidelines for contributing?
• Have you ensured that your commits follow the commit style guide?
• Have you checked that there aren't other open pull requests for the same formula update/change?
• Have you built your formula locally with HOMEBREW_NO_INSTALL_FROM_API=1 brew install --build-from-source <formula>, where <formula> is the name of the formula you're submitting?
• Is your test running fine brew test <formula>, where <formula> is the name of the formula you're submitting?
• Does your build pass brew audit --strict <formula> (after doing HOMEBREW_NO_INSTALL_FROM_API=1 brew install --build-from-source <formula>)? If this is a new formula, does it pass brew audit --new <formula>?

[methane]

Building [email protected] also fail with this error.
It seems recent compiler version cause this build error.

MySQL fixed this error only in MySQL 8.4.4+. MySQL 8.0.42 doesn't include this patch.

mysql/mysql-server@cceb500

[methane]

reported the issue. https://bugs.mysql.com/bug.php?id=118026