Use ErrorList for experiment validator #594

Job	Run time
e2e (v1.27.11, long-running-resume,from-volume-resume,median-stop)	17m 55s
e2e (v1.27.11, grid,bayesian-optimization,tpe,multivariate-tpe,cma-es,hyperband)	19m 59s
e2e (v1.27.11, file-metrics-collector,pytorchjob-mnist)	15m 58s
e2e (v1.27.11, median-stop-with-json-format,file-metrics-collector-with-json-format)	13m 20s
e2e (v1.28.7, long-running-resume,from-volume-resume,median-stop)	16m 43s
e2e (v1.28.7, grid,bayesian-optimization,tpe,multivariate-tpe,cma-es,hyperband)	23m 14s
e2e (v1.28.7, file-metrics-collector,pytorchjob-mnist)	14m 31s
e2e (v1.28.7, median-stop-with-json-format,file-metrics-collector-with-json-format)	12m 51s
e2e (v1.29.2, long-running-resume,from-volume-resume,median-stop)	15m 10s
e2e (v1.29.2, grid,bayesian-optimization,tpe,multivariate-tpe,cma-es,hyperband)	21m 0s
e2e (v1.29.2, file-metrics-collector,pytorchjob-mnist)	14m 20s
e2e (v1.29.2, median-stop-with-json-format,file-metrics-collector-with-json-format)	13m 0s
	3h 18m 1s

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