[Example] NanoGPT support in DLrover #1546

Job	Run time
dlrover-python-test	3m 17s
pre-commit	1m 57s
dlrover-trainer-test	2m 14s
atorch-pre-commit	4m 23s
atorch-python-test	5m 24s
brain-test	2m 28s
dlrover-client-test	2m 36s
dlrover-system-test-criteo-deeprec	3m 26s
dlrover-system-test-deepfm	3m 26s
dlrover-system-test-tf2	2m 4s
operator-test	2m 15s
tfplus-pre-commit	1m 13s
tfplus-python-test	1m 20s
	36m 3s

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