HPCC-11653 Merge roxie endpoint results for control:queries

Also update WsWorkunits::WUQuerysetDetails to reflect change.

This branch is a rebase for 4.2.6.

This change has already been merged into 5.0 with pull request:
https://github.com/hpcc-systems/HPCC-Platform/pull/5658

Signed-off-by: Anthony Fishbeck <anthony.fishbeck@lexisnexis.com>
Merge pull request #6050 from afishbeck/optControlQueries2.4.6

HPCC-11653 Merge roxie endpoint results for control:queries for release 4.2.6

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>