sink(ticdc): fix duplicated replace when batch-replace is disabled (#4502)

[ti-chi-bot]

This is an automated cherry-pick of #4502

What problem does this PR solve?

Issue Number: close #4501

What is changed and how it works?

Remove duplicated sqls.

Check List

Tests

• Unit test
• Integration test

Release note

Fix a bug that MySQL sink will generate duplicated replace SQL if `batch-replace-enable` is disabled.

[ti-chi-bot]

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[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (release-5.2@363517b). Click here to learn what that means.
The diff coverage is n/a.

@@               Coverage Diff                @@
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[amyangfei]

/merge

[ti-chi-bot]

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

Commit hash: df37279

[amyangfei]

/run-kafka-integration-test