Optimize diagnosis-manager's logging #4558

Job	Run time
dlrover-system-test-criteo-deeprec	2m 45s
dlrover-system-test-criteo-deeprec	2m 45s
brain-test	1m 31s
brain-test	1m 31s
dlrover-python-test	4m 3s
dlrover-python-test	4m 7s
dlrover-system-test-deepfm	2m 56s
dlrover-system-test-deepfm	2m 56s
dlrover-system-test-tf2	1m 18s
dlrover-system-test-tf2	1m 18s
go-master-test	1m 5s
go-master-test	1m 5s
operator-test	1m 29s
operator-test	1m 29s
pre-commit	1m 18s
pre-commit	1m 18s
	32m 54s

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