HPCC-9539 Expose SuperFile info from WsWorkunits::WUQueryDetails

control:getQueryXrefInfo now includes information on the SuperFiles
used by a query.  Operations has asked that it be exposed from
WsWorkunits::WUQueryDetails.

Signed-off-by: Anthony Fishbeck <Anthony.Fishbeck@lexisnexis.com>
Merge pull request #4538 from afishbeck/queryDetailsFileListNestedSuperfiles

HPCC-9539 Expose SuperFile info from WsWorkunits::WUQueryDetails

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>