Fix: NodeMeta object has no attribute gpu_num #1539

Job	Run time
pre-commit	1m 50s
brain-test	2m 30s
dlrover-system-test-deepfm	3m 31s
dlrover-python-test	3m 17s
dlrover-system-test-criteo-deeprec	3m 13s
dlrover-trainer-test	2m 15s
operator-test	2m 29s
dlrover-client-test	2m 36s
atorch-python-test	6m 6s
atorch-pre-commit	4m 23s
dlrover-system-test-tf2	1m 56s
tfplus-pre-commit	1m 9s
tfplus-python-test	1m 16s
	36m 31s

Provide feedback