Add a test that failed to highlight the error described in #11796

Using a json column with enumType, if the database contains a value that is not in enum, so an exception is thrown AbstractHydrator::buildEnum then converted to another exception in SimpleObjectHydrator. During this conversion, the original value is casted into string. In case of array of enum (json or simple array), $originalValue contains an array of string that can not be casted to string. So we got the "Array to string conversion" error instead of a proper error about a case not listed in the enum.