How to test

As this is a config specific item, the behavior of the shop should be unchanged. To verify the item, a developer could do:

1. Take develop branch and insert the below 2 lines in a Symfony controller to be able to verify the value of the configuration options passed to Doctrine
2. Take this Pull Request branch and do the same, verify that despite the code changes the configuration options passed to Doctrine remain unchanged

2 lines of code

$b = $this->get('doctrine.dbal.default_connection');
dump($b->getParams());

The behavior is "nothing has changed" because I believe the fix will only fix the situation for a subset of users, victims of #33524