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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[ti-chi-bot]

@ti-chi-bot: This cherry pick PR is for a release branch and has not yet been approved by release team.
Adding the do-not-merge/cherry-pick-not-approved label.

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[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (release-5.0@8b83d27). Click here to learn what that means.
The diff coverage is n/a.

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