[WIP] Refactor diagnosis manager #4103

Job	Run time
dlrover-python-test	8m 9s
brain-test	1m 33s
atorch-python-test	5m 33s
atorch-pre-commit	2m 51s
dlrover-system-test-criteo-deeprec	2m 52s
dlrover-system-test-deepfm	2m 34s
dlrover-system-test-tf2	1m 25s
operator-test	1m 29s
tfplus-pre-commit	1m 4s
tfplus-python-test	9s
pre-commit	1m 13s
	28m 52s

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