[DBAL-589] Fix type hint in Column::visit()

Demonstrates that NULL parameters are handled incorrectly by the sql parser utils as of 2.3.4

If allow_url_fopen isnt enabled, fopen will return false.

Fixed a PHP warning in DBALException::driverExceptionDuringQuery() when a parameter contains binary data.

- added test for getListTableColumnsSQL
- added test for getListTableForeignKeysSQL
- added test for getListTableIndexesSQL