tikv: update auto compaction config

[v01dstar]

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[ti-chi-bot]

Hi @v01dstar. Thanks for your PR.

I'm waiting for a pingcap member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[v01dstar]

/cc @Connor1996

[v01dstar]

/ok-to-test

[ti-chi-bot]

@v01dstar: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

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[v01dstar]

/cc @Oreoxmt

[Oreoxmt]

/ok-to-test

[Oreoxmt]

@v01dstar This PR removes the following TiKV configuration items:

• region-compact-check-interval
• region-compact-check-step
• region-compact-min-tombstones
• region-compact-tombstones-percent
• region-compact-min-redundant-rows
• region-compact-redundant-rows-percent

If these configuration items are deprecated starting from v7.5.7 or v9.0.0, they should be marked as deprecated in the documentation rather than deleted. Typically, we deprecate a config in one release and remove it in a later release.

If these items have already been removed from the codebase, it is appropriate to delete them from the configuration documentation. In that case, please also add corresponding release notes https://github.com/pingcap/docs-cn/pull/20705/files#diff-3ff8ef1f5dfa6d9aa8e12f68615eefd2c22f53ca43465a5efee9e2d066c597f3R16 to document this compatibility change.

Additionally, consider adding a general note to help users understand the transition. For example:

This configuration item has been migrated from raftstore.region-compact-check-interval to gc.auto-compaction.check-interval. Starting from v7.5.7 and v9.0.0, raftstore.region-compact-check-interval no longer takes effect.

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2025-08-07 02:27:35.838059211 +0000 UTC m=+494365.980820376: ☑️ agreed by overvenus.
• 2025-08-22 06:48:38.644241901 +0000 UTC m=+595326.587417417: ☑️ agreed by Oreoxmt.

[qiancai]

Rest LGTM

[qiancai]

L188~L191, RocksDB 加上括号不太容易理解，可以去掉括号，或者直接去掉 (RocksDB) 吗

[v01dstar]

取决于读者是谁，如果是懂 tikv 的，加上可能更好，不懂的话，他应该不会看这些参数吧。