sink(ticdc): fix incorrect default field (#12038)

[ti-chi-bot]

This is an automated cherry-pick of #12038

What problem does this PR solve?

Issue Number: close #12037

What is changed and how it works?

OriginDefaultValue is used as the column value when the default value is invisible.
It should not be used as the default field.

Affected protocol

• Cloud Storage
• Simple
• Avro
• Debezium

Check List

Tests

• Unit test
• Integration test

Questions

Will it cause performance regression or break compatibility?

Do you need to update user documentation, design documentation or monitoring documentation?

Release note

fix incorrect `default` field.

[ti-chi-bot]

This cherry pick PR is for a release branch and has not yet been approved by triage owners.
Adding the do-not-merge/cherry-pick-not-approved label.

To merge this cherry pick:

1. It must be approved by the approvers firstly.
2. AFTER it has been approved by approvers, please wait for the cherry-pick merging approval from triage owners.

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[ti-chi-bot]

@wk989898 This PR has conflicts, I have hold it.
Please resolve them or ask others to resolve them, then comment /unhold to remove the hold label.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Please upload report for BASE (release-8.1@e150d73). Learn more about missing BASE report.

Additional details and impacted files

Components	Coverage Δ
cdc	61.4504% <0.0000%> (?)
dm	51.0549% <0.0000%> (?)
engine	63.4232% <0.0000%> (?)

Flag	Coverage Δ
unit	57.2631% <100.0000%> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

@@               Coverage Diff                @@
##             release-8.1     #12052   +/-   ##
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  Coverage               ?   57.2631%           
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  Files                  ?        854           
  Lines                  ?     126577           
  Branches               ?          0           
================================================
  Hits                   ?      72482           
  Misses                 ?      48651           
  Partials               ?       5444           

[wk989898]

/unhold

[wk989898]

/retest-required

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: wk989898

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