HPCC-9667 Don't use buildTempExpr for getresults (can clone rows)

Signed-off-by: Gavin Halliday <gavin.halliday@lexisnexis.com>
Merge pull request #4622 from ghalliday/issue9667

HPCC-9667 Don't use buildTempExpr for getresults (can clone rows)

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>