security: Add "marker" mode for log densensitation

[JaySon-Huang]

What problem does this PR solve?

Issue Number: close https://github.com/pingcap/tiflash/issues/8977

Problem Summary:

In the previous PR, https://github.com/pingcap/tiflash/issues/1277, tiflash support setting security.redact_info_log to be set as "true" / "false". If the configuration item is set to true, all user data in the log is replaced by ?.

What is changed and how it works?

Support setting config "security.redact_info_log=marker" for log densensitation

Mark sensitive data with ‹..›. when security.redact_info_log=marker. Note that ‹ is not "less" < but U+2039. If the raw data contains ‹, ‹ will be escaped to ‹‹, similar to ›.

Introduce Redact::toMarkerString to handle marking sensitive data with ‹..› and escaping.

---

• [x] Pending for https://github.com/tikv/client-c/pull/184

Check List

Tests

• [x] Unit test
• [ ] Integration test
• [x] Manual test (add detailed scripts or steps below)
• [ ] No code

Side effects

• [ ] Performance regression: Consumes more CPU
• [ ] Performance regression: Consumes more Memory
• [ ] Breaking backward compatibility

Documentation

• [ ] Affects user behaviors
• [ ] Contains syntax changes
• [ ] Contains variable changes
• [ ] Contains experimental features
• [ ] Changes MySQL compatibility

Release note

Support "marker" for log densensitation

[ti-chi-bot[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: JinheLin, Lloyd-Pottiger

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Needs approval from an approver in each of these files: - ~~[OWNERS](https://github.com/pingcap/tiflash/blob/master/OWNERS)~~ [JinheLin,Lloyd-Pottiger] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment

[ti-chi-bot[bot]]

[LGTM Timeline notifier]

Timeline:

• 2024-06-18 03:40:00.189331854 +0000 UTC m=+86126.674820681: :ballot_box_with_check: agreed by JinheLin.
• 2024-06-18 03:47:05.417885443 +0000 UTC m=+86551.903374275: :ballot_box_with_check: agreed by Lloyd-Pottiger.