metrics: tidb_statistics_auto_analyze_total should be int (#51050)

[ti-chi-bot]

This is an automated cherry-pick of #51050

What problem does this PR solve?

Issue Number: close #51051

Problem Summary:

What changed and how does it work?

In the grafana. QPS of the auto analyze is float. It should be int.

Check List

Tests

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

• No need to test

  • I checked and no code files have been changed.

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

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (release-6.5@2ec7e32). Click here to learn what that means.
The diff coverage is n/a.

Additional details and impacted files

@@               Coverage Diff                @@
##             release-6.5     #51060   +/-   ##
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  Lines                  ?     350593           
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  Hits                   ?     258119           
  Misses                 ?      75893           
  Partials               ?      16581           

[AilinKid]

conflicts

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: AilinKid, hawkingrei

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-02-11 15:10:59.318699139 +0000 UTC m=+715184.885469018: ☑️ agreed by AilinKid.
• 2024-02-13 14:39:44.161846769 +0000 UTC m=+886109.728616643: ☑️ agreed by hawkingrei.