metrics(ticdc): Fix kafka compress ratio issue (#11313)

[ti-chi-bot]

This is an automated cherry-pick of #11313

What problem does this PR solve?

Issue Number: close #11314

What is changed and how it works?

follow the kafka producer compression ratio definition: https://pkg.go.dev/github.com/IBM/sarama#section-readme

compression ratio = Size of original data / Size of compressed data * 100

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`.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Please upload report for BASE (release-8.1@20ee93f). Learn more about missing BASE report.

Additional details and impacted files

Components	Coverage Δ
cdc	61.9870% <0.0000%> (?)
dm	51.3677% <0.0000%> (?)
engine	63.4373% <0.0000%> (?)

Flag	Coverage Δ
unit	57.6190% <0.0000%> (?)

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

@@               Coverage Diff                @@
##             release-8.1     #11327   +/-   ##
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  Coverage               ?   57.6190%           
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  Files                  ?        853           
  Lines                  ?     126125           
  Branches               ?          0           
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  Hits                   ?      72672           
  Misses                 ?      48048           
  Partials               ?       5405           

[3AceShowHand]

/retest

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/retest

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/retest

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@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-storage-test	f00f8116fc7bc5b34e3d35f37ee0c04eeaeafe00	link	true	/test cdc-integration-storage-test

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[3AceShowHand]

/retest