*: add MVCC version ratio to slow log metrics (#44897)

[ti-chi-bot]

This is an automated cherry-pick of #44897

What problem does this PR solve?

Issue Number: close #44896

Problem Summary:
Add MVCC version ratio to slow log metrics.

What is changed and how it works?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)

1. create a new cluster
2. run the benchmark test: sysbench oltp_read_write
3. check slow query panel on grafana

• No code

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

None

[jackysp]

/run-monitor-test

[jackysp]

Because there was a conflict, I manually tested it. It seems to be okay.

[jackysp]

/run-monitor-test

@qiffang it doesn't work anymore, PTAL.

[jackysp]

/rebuild

[jackysp]

@hawkingrei why is the building failed, could you please take a look? Thx!

[hawkingrei]

/retest

[bb7133]

LGTM

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-08-18 03:21:06.970565931 +0000 UTC m=+860431.519581914: ☑️ agreed by bb7133.
• 2023-08-18 03:21:41.580030409 +0000 UTC m=+860466.129046395: ☑️ agreed by jackysp.

[hawkingrei]

@hawkingrei why is the building failed, could you please take a look? Thx!

It is a CI timeout. the solution is to rerun it.

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (release-6.5@76953b2). Click here to learn what that means.
The diff coverage is n/a.

Additional details and impacted files

@@               Coverage Diff                @@
##             release-6.5     #46205   +/-   ##
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  Coverage               ?   73.7503%           
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  Files                  ?       1084           
  Lines                  ?     348409           
  Branches               ?          0           
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  Hits                   ?     256953           
  Misses                 ?      75015           
  Partials               ?      16441           

[jackysp]

/merge

[ti-chi-bot]

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[jackysp]

/approve

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: bb7133, jackysp

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