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`.

[ti-chi-bot]

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[codecov]

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	61.6429% <0.0000%> (?)
dm	51.2405% <0.0000%> (?)
engine	63.4232% <0.0000%> (?)

Flag	Coverage Δ
unit	57.3992% <0.0000%> (?)

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