mysql: backwards compatibility fix for mysql client binary

[fulghum]

Adds -DWITH_AUTHENTICATION_CLIENT_PLUGINS=yes build arg to enable backwards compatibility for the mysql client that is included with the MySQL-9 formula. (Note that this fix does not cover the separate mysql-client formula. If this change is accepted, I'm happy to patch the mysql-client formula, too.)

This patches the accepted, upstream MySQL bug: https://bugs.mysql.com/bug.php?id=116616

The MySQL 9.0 Release notes state that the intent of the release was for the mysql client to remain backwards compatible by continuing to provide support for the mysql_native_password auth plugin. This is also reflected in the official MySQL binaries from Oracle, which were built with the -DWITH_AUTHENTICATION_CLIENT_PLUGINS=yes. In the MySQL bug report linked above, the MySQL team has agreed that it was an error for the source build args to not include -DWITH_AUTHENTICATION_CLIENT_PLUGINS=yes.

Related to: #181805 (Original PR by @cswingler for the same fix for mysql-client)

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[SMillerDev]

This needs a dependency on libfido