KEP-2170: Add the TrainJob state transition design #1661

Job	Run time
integration-test (v1.29.2, none, 3.10)	16m 19s
integration-test (v1.27.11, none, 3.11)	16m 43s
integration-test (v1.28.7, none, 3.8)	17m 50s
integration-test (v1.29.2, scheduler-plugins, 3.9)	16m 2s
integration-test (v1.27.11, scheduler-plugins, 3.10)	15m 46s
integration-test (v1.28.7, scheduler-plugins, 3.11)	15m 58s
integration-test (v1.29.2, volcano, 3.8)	15m 31s
integration-test (v1.27.11, volcano, 3.9)	15m 31s
integration-test (v1.28.7, volcano, 3.10)	17m 24s
	2h 27m 4s

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