ticdc: fix ddl exchange partition xxxx with validation
to deal with with validation
correctly (#10867)
#10868
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This is an automated cherry-pick of #10867
What problem does this PR solve?
Issue Number: close #10859
What is changed and how it works?
Determine whether it is necessary to add without validation in the
exchange partition
.Check List
Tests
test the case mentioned in issue, and check the result in downstream db.
Questions
Will it cause performance regression or break compatibility?
Do you need to update user documentation, design documentation or monitoring documentation?
Release note