HPCC-29657 Produce aggregate stats (e.g. spill, cost) whilst a job is running #9571

Job	Run time
check-skip	23s
Build platform and regress setup	43m 5s
unittests	4m 47s
eclwatch-ui-tests	2m 43s
regression-jobs (hthor, [a-d]*.ecl)	6m 7s
regression-jobs (hthor, [e-h]*.ecl)	5m 35s
regression-jobs (hthor, [i-l]*.ecl)	5m 50s
regression-jobs (hthor, [m-q]*.ecl)	5m 30s
regression-jobs (hthor, [r-u]*.ecl, teststdlibrary.ecl)	5m 19s
regression-jobs (hthor, [v-z]*.ecl)	6m 26s
regression-jobs (thor, [a-d]*.ecl)	3s
regression-jobs (thor, [e-h]*.ecl)	1s
regression-jobs (thor, [i-l]*.ecl)	1s
regression-jobs (thor, [m-q]*.ecl)	1s
regression-jobs (thor, [r-u]*.ecl, teststdlibrary.ecl)	1s
regression-jobs (thor, [v-z]*.ecl)	1s
regression-jobs (roxie, [a-d]*.ecl)	5m 7s
regression-jobs (roxie, [e-h]*.ecl)	3m 59s
regression-jobs (roxie, [i-l]*.ecl)	4m 38s
regression-jobs (roxie, [m-q]*.ecl)	2m 30s
regression-jobs (roxie, [r-u]*.ecl, teststdlibrary.ecl)	1m 28s
regression-jobs (roxie, [v-z]*.ecl)	35s
regression-jobs (hthor, teststdlibrary.ecl)	4m 27s
regression-jobs (thor, teststdlibrary.ecl)	1s
regression-jobs (roxie, teststdlibrary.ecl)	1m 18s
	1h 49m 56s

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