s3Sink: cancel create existing table directory on s3 when initialize s3Sink (#1477)

[ti-srebot]

cherry-pick #1477 to release-5.0
You can switch your code base to this Pull Request by using git-extras:

# In ticdc repo:
git pr https://github.com/pingcap/ticdc/pull/1672

After apply modifications, you can push your change to this PR via:

git push git@github.com:ti-srebot/ticdc.git pr/1672:release-5.0-cc8eadf2f70e

---

s3Sink: cancel create existing table directory on s3 when initialize s3Sink

fix bug #1463 reported

What problem does this PR solve?

fix bug #1463 reported

What is changed and how it works?

https://github.com/pingcap/ticdc/blob/355016c0ee9d689fe203db57a18449afe26271d9/cdc/sink/cdclog/s3.go#L318-L327
S3 does not create an empty directory. This code causes S3 to create objects instead of directories, like this:

Uploading objects to these directories will cause an error, like:

"code": "CDC:ErrProcessorUnknown",
"message": "[CDC:ErrS3SinkStorageAPI]XMinioParentIsObject: Object-prefix is already an object, please choose a different object-prefix name.\n\tstatus code: 400, request id: 166825DDCC17A799, host id: "

So I deleted the code.

Check List

Tests

• Manual test (add detailed scripts or steps below)
• No code

Code changes

• Has exported function/method change

Side effects

• Possible performance regression

Related changes

• Need to cherry-pick to the release branch

Release note

• s3Sink: cancel create existing table directory on s3 when initialize s3Sink to avoid uploading objects faild

[ti-srebot]

/run-all-tests

[zier-one]

/lgtm

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• amyangfei
• leoppro

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[amyangfei]

/merge

[ti-chi-bot]

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

Commit hash: 36d4910