tikv: update auto compaction config (#20708) (#20887)

[ti-chi-bot]

This is an automated cherry-pick of #20887

This is an automated cherry-pick of #20708

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[ti-chi-bot]

@ti-chi-bot This PR has conflicts, I have hold it.
Please resolve them or ask others to resolve them, then comment /unhold to remove the hold label.

[ti-chi-bot]

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[Oreoxmt]

/unhold

[Oreoxmt]

/approve

[ti-chi-bot]

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