[WIP][4/N] Refine beginner tutorial by accelerator api #3571

Job	Run time
pytorch_tutorial_build_worker (1, 15, linux.g5.12xlarge.nvidia.gpu)	15m 53s
pytorch_tutorial_build_worker (2, 15, linux.g5.4xlarge.nvidia.gpu)	52m 3s
pytorch_tutorial_build_worker (3, 15, linux.g5.4xlarge.nvidia.gpu)	21m 36s
pytorch_tutorial_build_worker (4, 15, linux.g5.4xlarge.nvidia.gpu)	31m 0s
pytorch_tutorial_build_worker (5, 15, linux.g5.4xlarge.nvidia.gpu)	21m 54s
pytorch_tutorial_build_worker (6, 15, linux.g5.4xlarge.nvidia.gpu)	19m 7s
pytorch_tutorial_build_worker (7, 15, linux.4xlarge.nvidia.gpu)	22m 52s
pytorch_tutorial_build_worker (8, 15, linux.4xlarge.nvidia.gpu)	17m 8s
pytorch_tutorial_build_worker (9, 15, linux.4xlarge.nvidia.gpu)	20m 43s
pytorch_tutorial_build_worker (10, 15, linux.4xlarge.nvidia.gpu)	18m 51s
pytorch_tutorial_build_worker (11, 15, linux.4xlarge.nvidia.gpu)	18m 38s
pytorch_tutorial_build_worker (12, 15, linux.4xlarge.nvidia.gpu)	34m 14s
pytorch_tutorial_build_worker (13, 15, linux.4xlarge.nvidia.gpu)	45m 38s
pytorch_tutorial_build_worker (14, 15, linux.4xlarge.nvidia.gpu)	37m 20s
pytorch_tutorial_build_worker (15, 15, linux.4xlarge.nvidia.gpu)	30m 38s
pytorch_tutorial_build_manager	0s
	6h 47m 35s

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