Revert "dm/test: swap upstream and downstream of sync_diff in some ca… (#4382)#4398

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ti-chi-bot merged 1 commit intopingcap:release-5.3from ti-chi-bot:cherry-pick-4382-to-release-5.3

Jan 19, 2022

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Commits on Jan 19, 2022

Revert "dm/test: swap upstream and downstream of sync_diff in some cases (pingcap#3413 )"

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