docs: sync Resolved TS row/panel names with TiKV dashboard

[lilin90]

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What is changed, added, or deleted? (Required)

The Resolved-TS section in grafana-tikv-dashboard.md was out of sync with current TiKV dashboard titles, including two safe-ts panels whose meanings are now follower-scoped. This update aligns labels and descriptions with the upstream dashboard source.

• Resolved TS section title and panel title alignment

  • Renamed section heading Resolved-TS → Resolved TS
  • Updated seven panel names to match TiKV dashboard casing/wording exactly:
    • Resolved TS Worker CPU
    • Advance ts Worker CPU
    • Scan lock Worker CPU
    • Check leader duration
    • Max gap of resolved-ts in region leaders
    • Max gap of follower safe-ts
    • Min Safe TS Follower Region

• Follower safe-ts semantic correction

  • Updated descriptions for:
    • Max gap of follower safe-ts (minimum non-zero follower safe-ts gap to current time)
    • Min Safe TS Follower Region (follower Region with minimum safe-ts)

• Doc snippet (updated section excerpt)

  ### Resolved TS
  - Max gap of follower safe-ts: The maximum time difference between the minimum non-zero safe-ts of followers in this TiKV and the current time
  - Min Safe TS Follower Region: The ID of the follower Region whose safe-ts is the minimal

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What is the related PR or file link(s)?

• Related code change PR links (if applicable):
• This PR is translated from: docs: sync Resolved TS row/panel names with TiKV dashboard docs#23922
• Other reference link(s):
  • grafana-tikv-dashboard.md: Resolved TS row and panel names are out of sync with TiKV docs#23921
  • https://github.com/tikv/tikv/blob/bdf406fec82f5c54c1d76c445b8736ebeecd2a8d/metrics/grafana/tikv_details.dashboard.py#L8999-L9255

AI agent involvement

• The changes in this PR were primarily made by an AI agent on behalf of the PR author.

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

• Fixes #23921

Summary by CodeRabbit

• 新增功能

  • 新增多项 TiKV 监控指标，包括 Worker CPU、Check leader duration、Follower Region Safe TS 及 resolved-ts 间隔等指标。

• 文档更新

  • 统一 Grafana 面板与指标名称及大小写格式。
  • 更新相关操作指南和故障排查文档中的指标引用，确保名称与监控面板保持一致。

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Auto-sync completed successfully

Source PR: pingcap/docs#23922
Target PR: #21951

Chinese documentation has been updated based on English documentation changes.

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📥 Commits

Reviewing files that changed from the base of the PR and between 7e1b1f3 and 378fc1a.

📒 Files selected for processing (3)

• grafana-tikv-dashboard.md
• tikv-control.md
• troubleshoot-stale-read.md

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📝 Walkthrough

Walkthrough

更新 TiKV Grafana 面板中的指标名称，并同步 tikv-control.md 与 troubleshoot-stale-read.md 中的相关引用。

Changes

指标名称同步

Layer / File(s)	Summary
更新 Grafana 指标名称 grafana-tikv-dashboard.md	将 Resolved-TS 改为 Resolved TS，统一多个指标的大小写，并更新 Max gap of safe-ts 与 Min Safe TS Region 的名称。
同步文档引用 tikv-control.md, troubleshoot-stale-read.md	同步 Min Safe TS Follower Region、Resolved TS 和 Check leader duration 的文档引用。

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~5 minutes

Change: Other

Merge Risk: ⚪ Minimal · up to 378fc

本 PR 仅同步 Grafana 面板名称及相关文档引用，不改变运行逻辑或产品行为，可合并。

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	标题准确概括了 PR 的主要变更，即同步 Resolved TS 行和面板名称。标题简洁、明确，并与变更内容一致。
Description check	✅ Passed	PR 描述完整说明了变更内容、影响版本、相关 PR 和参考链接，并勾选了 master 版本及 AI 参与项。描述符合模板要求，且与实际变更一致。
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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[lilin90]

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