v8.5.4: tikv: update auto compaction config

[Oreoxmt]

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What is changed, added or deleted? (Required)

v8.5.4: tikv: update auto compaction config

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• master (the latest development version)
• v9.0 (TiDB 9.0 versions)
• v8.5 (TiDB 8.5 versions)
• v8.1 (TiDB 8.1 versions)
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• v6.5 (TiDB 6.5 versions)
• v6.1 (TiDB 6.1 versions)
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What is the related PR or file link(s)?

• This PR is translated from:
• Other reference link(s): tikv: update auto compaction config #20708; GC: Move gc compaction to gc worker module (#18724) tikv/tikv#18961

Do your changes match any of the following descriptions?

• Delete files
• Change aliases
• Need modification after applied to another branch
• Might cause conflicts after applied to another branch

[Oreoxmt]

/cc @v01dstar @qiancai

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2025-12-31 03:13:59.539596193 +0000 UTC m=+153595.357904625: ☑️ agreed by qiancai.

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[Oreoxmt]

/approve

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[APPROVALNOTIFIER] This PR is APPROVED

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[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-8.5: #21240.
But this PR has conflicts, please resolve them!