adding hugging face dataset download class #749

Job	Run time
integration-test (v1.26.6, none, 3.10)	22m 39s
integration-test (v1.27.3, none, 3.7)	22m 24s
integration-test (v1.25.11, none, 3.8)	22m 29s
integration-test (v1.26.6, scheduler-plugins, 3.9)	26m 20s
integration-test (v1.27.3, scheduler-plugins, 3.10)	23m 30s
integration-test (v1.25.11, scheduler-plugins, 3.10)	24m 45s
integration-test (v1.26.6, volcano, 3.9)	24m 31s
integration-test (v1.27.3, volcano, 3.10)	23m 40s
integration-test (v1.25.11, volcano, 3.10)	23m 58s
	3h 34m 16s

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