ddl, table: fix Duplicate partition field in list partition

[Defined2014]

What problem does this PR solve?

Issue Number: close #31784

Problem Summary:

What is changed and how it works?

Check List

Tests

• Unit test
• Integration test
• 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

return error when have duplicate columns in list partition.

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• xhebox
• xiongjiwei

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[Defined2014]

/cc @mjonss @xiongjiwei @xhebox
PTAL

[sre-bot]

Code Coverage Details: https://codecov.io/github/pingcap/tidb/commit/eb921a34271b0e2e01bb1fb7dc359f9def69d513

[Defined2014]

@xhebox @xiongjiwei Cloud you help me merge it?

[xhebox]

/merge

[ti-chi-bot]

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

Commit hash: ff9de08

[ti-chi-bot]

@Defined2014: Your PR was out of date, I have automatically updated it for you.

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/run-all-tests

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[Defined2014]

/run-all-tests