mounter(ticdc): default value convert to the correct data type

[3AceShowHand]

What problem does this PR solve?

Issue Number: close #10803

What is changed and how it works?

• convert the datum to the specific column type

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 the default value is always string type since not considering data type causes the open-protocol output incorrect type value

[codecov]

Codecov Report

Merging #10804 (32a8192) into master (12a184e) will increase coverage by 0.0406%.
Report is 5 commits behind head on master.
The diff coverage is 70.0000%.

Additional details and impacted files

Components	Coverage Δ
cdc	61.9036% <70.0000%> (+0.0071%)	⬆️
dm	51.2899% <ø> (+0.0686%)	⬆️
engine	63.4430% <ø> (+0.0706%)	⬆️

Flag	Coverage Δ
unit	57.5891% <70.0000%> (+0.0406%)	⬆️

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

@@               Coverage Diff                @@
##             master     #10804        +/-   ##
================================================
+ Coverage   57.5485%   57.5891%   +0.0406%     
================================================
  Files           853        853                
  Lines        126886     126958        +72     
================================================
+ Hits          73021      73114        +93     
+ Misses        48427      48411        -16     
+ Partials       5438       5433         -5     

[3AceShowHand]

/retest

[hongyunyan]

LGTM

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: CharlesCheung96, hongyunyan

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [CharlesCheung96,hongyunyan]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-03-20 01:53:11.787152077 +0000 UTC m=+1428018.809398457: ☑️ agreed by hongyunyan.
• 2024-03-20 06:55:53.748559221 +0000 UTC m=+1446180.770805609: ☑️ agreed by CharlesCheung96.

[3AceShowHand]

/retest

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-8.0: #10826.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-6.5: #10827.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.1: #10828.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.5: #10829.