KEP-2170: Add unit and Integration tests for model and dataset initializers #1897

Job	Run time
integration-test (v1.30.6, none, 3.10)	5m 22s
integration-test (v1.29.2, none, 3.10)	5m 24s
integration-test (v1.28.7, none, 3.8)	5m 26s
integration-test (v1.30.6, scheduler-plugins, 3.10)	5m 21s
integration-test (v1.29.2, scheduler-plugins, 3.9)	5m 24s
integration-test (v1.28.7, scheduler-plugins, 3.11)	5m 18s
integration-test (v1.30.6, volcano, 3.10)	5m 24s
integration-test (v1.29.2, volcano, 3.8)	5m 23s
integration-test (v1.28.7, volcano, 3.10)	5m 23s
	48m 25s

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