HPCC-10436 Timings missing from roxie queries

Add timings into workunit for Roxie queries executed using WU

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>
Merge pull request #5152 from richardkchapman/roxie-wu-timings

HPCC-10436 Timings missing from roxie queries

Reviewed-by: Gavin Halliday <ghalliday@hpccsystems.com>