Add TiCDC TSO acquisition in sync-diff-inspector doc

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Fix #11217

Add TiCDC TSO acquisition in sync-diff-inspector doc

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Why is this PR merged first? https://github.com/pingcap/docs-cn/pull/11273

@TomShawn

my PR is pending for reviewing but #11273 has been merged which do the similar work.

Thank you very much for creating this PR and contributing to TiDB documentation. We greatly appreciate your work. The TiCDC syncpoint is an experimental feature. It should have been properly documented as an experimental feature, but to our regret, it is not documented at all. Users cannot find the keyword "syncpoint".

As the TiCDC team plans to make it GA in the upcoming v6.3, they created https://github.com/pingcap/docs-cn/pull/11273 to fully introduce the concept of syncpoint, without knowing the existence of this PR. I think this PR should have been reviewed by the TiCDC team @asddongmen instead of @3pointer. Anyway, I think this PR is still a very good complement to https://github.com/pingcap/docs-cn/pull/11273. @asddongmen Could you please take a look?

I'm very sorry for not noticing your PR before. The TiCDC team has improved the syncpoint function and modified some configuration of it. After the work was done, I made changes to this part of the document. Now that the configuration and description of the syncpoint function are different from before, I have modified the content of your PR after review. Thanks a lot for your contribution!

/verify

/status LGT2

/merge

This pull request has been accepted and is ready to merge.

Commit hash: e432a724a3c05a09e094d73c135d0a126f80484e

/verify

/merge

In response to a cherrypick label: new pull request created: #11691.