Add test to create PyTorchJob from func #783

Job	Run time
integration-test (v1.26.6, none, 3.10)	23m 55s
integration-test (v1.27.3, none, 3.7)	25m 4s
integration-test (v1.25.11, none, 3.8)	23m 57s
integration-test (v1.26.6, scheduler-plugins, 3.9)	39m 40s
integration-test (v1.27.3, scheduler-plugins, 3.10)	40m 2s
integration-test (v1.25.11, scheduler-plugins, 3.10)	40m 17s
integration-test (v1.26.6, volcano, 3.9)	25m 31s
integration-test (v1.27.3, volcano, 3.10)	24m 58s
integration-test (v1.25.11, volcano, 3.10)	26m 8s
	4h 29m 32s

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