[WIP] Refactor diagnosis manager #4107

Job	Run time
dlrover-python-test	7m 39s
atorch-python-test	5m 34s
atorch-pre-commit	2m 41s
brain-test	1m 32s
dlrover-system-test-criteo-deeprec	2m 51s
dlrover-system-test-deepfm	2m 47s
dlrover-system-test-tf2	1m 27s
operator-test	1m 27s
pre-commit	1m 7s
tfplus-pre-commit	1m 4s
tfplus-python-test	6s
	28m 15s

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