HPCC-29657 Produce aggregate stats (e.g. spill, cost) whilst a job is running #9417

Job	Run time
check-skip	20s
Build platform and regress setup	1h 8m 3s
eclwatch-ui-tests	3m 14s
unittests	4m 9s
regression-jobs (hthor, [a-d]*.ecl)	8m 54s
regression-jobs (hthor, [e-h]*.ecl)	5m 44s
regression-jobs (hthor, [i-l]*.ecl)	10m 12s
regression-jobs (hthor, [m-q]*.ecl)	5m 49s
regression-jobs (hthor, [r-u]*.ecl, teststdlibrary.ecl)	14m 41s
regression-jobs (hthor, [v-z]*.ecl)	6m 32s
regression-jobs (thor, [a-d]*.ecl)	9m 10s
regression-jobs (thor, [e-h]*.ecl)	11m 12s
regression-jobs (thor, [i-l]*.ecl)	25m 42s
regression-jobs (thor, [m-q]*.ecl)	5m 55s
regression-jobs (thor, [r-u]*.ecl, teststdlibrary.ecl)	15m 38s
regression-jobs (thor, [v-z]*.ecl)	4m 51s
regression-jobs (roxie, [a-d]*.ecl)	8m 42s
regression-jobs (roxie, [e-h]*.ecl)	6m 19s
regression-jobs (roxie, [i-l]*.ecl)	9m 4s
regression-jobs (roxie, [m-q]*.ecl)	6m 53s
regression-jobs (roxie, [r-u]*.ecl, teststdlibrary.ecl)	19m 6s
regression-jobs (roxie, [v-z]*.ecl)	5m 45s
regression-jobs (hthor, teststdlibrary.ecl)	5m 7s
regression-jobs (thor, teststdlibrary.ecl)	6m 34s
regression-jobs (roxie, teststdlibrary.ecl)	4m 51s
	4h 32m 27s

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