TMDM-7599: "Query uses operators incompatible with 'text' data type (SQL Server)"

Overrides default Hibernate mapping of LONGVARCHAR to "text" (now nvarchar(max)).
Completes previous commit (previous commit only covered LONG - N  - VARCHAR).
(https://jira.talendforge.org/browse/TMDM-7599)
(cherry picked from commit 4483288)