KEP-2170: Rename TrainingRuntimeRef to RuntimeRef API #1558

Job	Run time
integration-test (v1.29.2, none, 3.10)	17m 22s
integration-test (v1.29.2, none, 3.10)	17m 22s
integration-test (v1.27.11, none, 3.11)	17m 37s
integration-test (v1.27.11, none, 3.11)	17m 37s
integration-test (v1.28.7, none, 3.8)	17m 7s
integration-test (v1.28.7, none, 3.8)	17m 7s
integration-test (v1.29.2, scheduler-plugins, 3.9)	18m 22s
integration-test (v1.29.2, scheduler-plugins, 3.9)	18m 22s
integration-test (v1.27.11, scheduler-plugins, 3.10)	19m 14s
integration-test (v1.27.11, scheduler-plugins, 3.10)	19m 14s
integration-test (v1.28.7, scheduler-plugins, 3.11)	18m 31s
integration-test (v1.28.7, scheduler-plugins, 3.11)	18m 31s
integration-test (v1.29.2, volcano, 3.8)	16m 40s
integration-test (v1.29.2, volcano, 3.8)	16m 40s
integration-test (v1.27.11, volcano, 3.9)	32m 31s
integration-test (v1.27.11, volcano, 3.9)	16m 59s
integration-test (v1.28.7, volcano, 3.10)	16m 57s
integration-test (v1.28.7, volcano, 3.10)	16m 57s
	5h 33m 10s

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