planner: add more checks when pushing TopN down (#41370)#41466

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ti-chi-bot wants to merge 1 commit intopingcap:release-5.4from ti-chi-bot:cherry-pick-41370-to-release-5.4

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Commits on Feb 15, 2023

This is an automated cherry-pick of pingcap#41370

Dousir9
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