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

Default max varchar size before switching to large clob is 4000 (SQL Server only).
(https://jira.talendforge.org/browse/TMDM-7599)
(cherry picked from commit a09c3a343878c586dd26e37374d4e8067d5de42c)