Update ddp_minGPT to remove FSDP1 references #4740

Job	Run time
pytorch_tutorial_build_worker (4, 15, linux.g5.4xlarge.nvidia.gpu)	13m 59s
pytorch_tutorial_build_worker (2, 15, linux.g5.4xlarge.nvidia.gpu)	40m 18s
pytorch_tutorial_build_worker (5, 15, linux.g5.4xlarge.nvidia.gpu)	22m 32s
pytorch_tutorial_build_worker (8, 15, linux.g5.4xlarge.nvidia.gpu)	14m 43s
pytorch_tutorial_build_worker (13, 15, linux.g5.4xlarge.nvidia.gpu)	19m 1s
pytorch_tutorial_build_worker (10, 15, linux.g5.4xlarge.nvidia.gpu)	15m 43s
pytorch_tutorial_build_worker (3, 15, linux.g5.4xlarge.nvidia.gpu)	21m 21s
pytorch_tutorial_build_worker (7, 15, linux.g5.4xlarge.nvidia.gpu)	21m 2s
pytorch_tutorial_build_worker (12, 15, linux.g5.4xlarge.nvidia.gpu)	26m 22s
pytorch_tutorial_build_worker (9, 15, linux.g5.4xlarge.nvidia.gpu)	14m 8s
pytorch_tutorial_build_worker (1, 15, linux.g5.12xlarge.nvidia.gpu)	14m 35s
pytorch_tutorial_build_worker (6, 15, linux.g5.4xlarge.nvidia.gpu)	16m 49s
pytorch_tutorial_build_worker (11, 15, linux.g5.4xlarge.nvidia.gpu)	16m 26s
pytorch_tutorial_build_worker (14, 15, linux.g5.4xlarge.nvidia.gpu)	33m 25s
pytorch_tutorial_build_worker (15, 15, linux.g5.4xlarge.nvidia.gpu)	25m 52s
pytorch_tutorial_build_manager	22m 35s
	5h 38m 51s

Provide feedback