[jdbc-v2] review default value for wait_end_of_query

### Description

There is setting `wait_end_of_query` https://clickhouse.com/docs/operations/settings/settings#http_wait_end_of_query that enabled query buffering on server side.
Mainly how it affects query of big data and statistics returned in response.

What need to be done:
- Explore effect on client side.
- Document usage
- Update code if needed.