Guard against missing PDO MySQL constants

[RobXYZ]

I found commands like sql:drop starting throwing errors after updating from 13.6.2 to 13.7 on my web host.

Error: Call to a member function command() on null in Drush\Commands\sql\SqlCommands->validate() (line 244 of /drush/drush/src/Commands/sql/SqlCommands.php).

This seems to be due to undefined PDO::MYSQL_ATTR_* constants. SqlBase::create() swallowed and returned null.

Codex found and wrote this fix so it may not be correct but hopefully points in the right direction.

[weitzman]

Whats your PHP version?

[RobXYZ]

PHP 8.3.27

[weitzman]

I'm not sure that its valid for those constants to be missing. Your mPDO would be busted. Anyway, here is how Drupal core handled this, in case anyone wants to make a different PR. I would merge that approach.