KEP-2170: Adding CEL validations on v2 TrainJob CRD #1567

Job	Run time
integration-test (v1.29.2, none, 3.10)	16m 36s
integration-test (v1.27.11, none, 3.11)	16m 52s
integration-test (v1.28.7, none, 3.8)	17m 35s
integration-test (v1.29.2, scheduler-plugins, 3.9)	16m 3s
integration-test (v1.27.11, scheduler-plugins, 3.10)	17m 34s
integration-test (v1.28.7, scheduler-plugins, 3.11)	18m 0s
integration-test (v1.29.2, volcano, 3.8)	15m 41s
integration-test (v1.27.11, volcano, 3.9)	15m 37s
integration-test (v1.28.7, volcano, 3.10)	17m 22s
	2h 31m 20s

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