Scan query gracefully closing connections which results in partial data read from datasource

### Affected Version

Druid 0.19.1

### Description

The scenario arises when we fire a Scan query to read all rows for a given day (typically around 1mill records, takes around 10-15 min to complete) from the datasource.

We observe that if there are N records for that given day, sometimes it will read

Review the closed pull request #13492 and the reported broker, historical, and router timeout configurations first, since the issue links no source files or tests. Reproduce the parallel Scan-query stress test described in the report and verify that a complete result is returned without silent connection closure or partial data.

Written by the indexing model from the issue text.