HPCC-10849 Disable through spills for roxie - they only cause problems

Signed-off-by: Gavin Halliday <gavin.halliday@lexisnexis.com>
Merge pull request #5406 from ghalliday/issue10849

HPCC-10849 Disable through spills for roxie - they only cause problems

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>