The phpunit-bridge has been removed in #3643, so these no longer serve
any purpose. The tests themselves are kept since they check that there
is no crash when using an unknown option, and do not need a phpunit
assertion to do so.

The method is not used for anything else than skipping tests for specific drivers. Cross-driver portability should be established by drivers, not outside of them based on their name.

Remove deprecated AbstractSchemaManager::getFilterSchemaAssetsExpression(), Configuration::getFilterSchemaAssetsExpression() and Configuration::getFilterSchemaAssetsExpression()

Reworked `AbstractSchemaManager::extractDoctrineTypeFromComment()` removed `::removeDoctrineTypeFromComment()`

Changed the type of `$char` in `AbstractPlatform::getTrimExpression()` from `string|false` to `?string`