Changing column type to string adds unnecessary parameter to table DDL

#### System information:
- DBeaver version 21.2.0 EA

#### Connection specification:
- Database name and version Hive

#### Steps to reproduce, if exist:
1. Open a table import dialog
2. Change column type to STRING from another
3. Ope DDL preview

**Expected:** STRING types doesn't have additional values in its DDL
**Actual result:** STRING **(10)** is written in the DDL

https://user-images.githubusercontent.com/51405061/131100377-c00c9666-2222-4cc0-ba9d-48b41661e627.mp4

Note: It happens only with String type (Varchar type has such paramater and it is expected for it)