clickhouse-client: chunking streaming input

In seems that clickhouse-client waits for stdin streams to terminate before running queries.

**Use case**

Inserting data in a table by streaming input into clickhouse-client. The stream goes on indefinitely.

Example:
```
my_source_of_data | clickhouse-client --query='INSERT INTO logs FORMAT JSONEachRow' --input_format_allow_errors_ratio=1
```

**Describe the solution you'd like**

clickhouse-client could buffer the input up to a configurable amount of space/time e.g. 100KB or 1 second, then run the insert query and go back to buffering more data.