HHH-18168 Fix for Informix plural attribute size function support

[VladoKuruc]

I'm not sure whether all of the methods in the StandardSqmTranslatorFactory should be overridden, but since there is an HQL query in one of the unit tests "delete SimpleEntityWithAssociation e where size( e.associatedEntities ) = 0 and e.name like '%'" I assume that at least the createSimpleDeleteTranslator method needs to be overridden.

https://hibernate.atlassian.net/browse/HHH-18168