mounter(ticdc): decode bytes-level checksum and encode columns-level checksum (#10706)

[ti-chi-bot]

This is an automated cherry-pick of #10706

What problem does this PR solve?

Issue Number: close #10969

What is changed and how it works?

• mounter decode checksum v2

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Questions

Will it cause performance regression or break compatibility?

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

Release note

`None`

[ti-chi-bot[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.

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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[bot]]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: Once this PR has been reviewed and has the lgtm label, please assign benjamin2037 for approval. For more information see the Code Review Process.

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[codecov[bot]]

Codecov Report

Attention: Patch coverage is 60.28369% with 56 lines in your changes missing coverage. Please review.

Please upload report for BASE (release-8.2@29aac52). Learn more about missing BASE report.

Additional details and impacted files

Components	Coverage Δ
cdc	61.3804% <0.0000%> (?)
dm	51.1849% <0.0000%> (?)
engine	63.3879% <0.0000%> (?)

Flag	Coverage Δ
unit	57.5994% <60.2836%> (?)

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

@@               Coverage Diff                @@
##             release-8.2     #11380   +/-   ##
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  Coverage               ?   57.5994%           
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  Files                  ?        849           
  Lines                  ?     126286           
  Branches               ?          0           
================================================
  Hits                   ?      72740           
  Misses                 ?      48136           
  Partials               ?       5410           

[ti-chi-bot[bot]]

@ti-chi-bot: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-cdc-integration-kafka-test	d6c60e76bb67a3fc7dcbd17ce1ad3c9ac19ded34	link	true	/test cdc-integration-kafka-test

Full PR test history. Your PR dashboard.

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[3AceShowHand]

no need to cherry-pick back to release-8.2