stats: extract some functions for future SchemaChangeHandler use

[lance6716]

What problem does this PR solve?

Issue Number: ref #55722

Problem Summary:

What changed and how does it work?

in a short peroid the HandleDDLEvent and new SchemaChangeHandler will both exist, so I extract some function to let them execute the same logic.

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

[tiprow]

Hi @lance6716. Thanks for your PR.

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[codecov]

Codecov Report

Attention: Patch coverage is 70.74468% with 55 lines in your changes missing coverage. Please review.

Project coverage is 75.7295%. Comparing base (b520f61) to head (b50ceec).
Report is 23 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #56379        +/-   ##
================================================
+ Coverage   73.3867%   75.7295%   +2.3427%     
================================================
  Files          1620       1645        +25     
  Lines        447041     461379     +14338     
================================================
+ Hits         328069     349400     +21331     
+ Misses        98877      90629      -8248     
- Partials      20095      21350      +1255     

Flag	Coverage Δ
integration	50.9263% <51.5957%> (?)
unit	72.9374% <66.4893%> (+0.4592%)	⬆️

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

Components	Coverage Δ
dumpling	52.9478% <ø> (ø)
parser	∅ <ø> (∅)
br	52.1926% <ø> (+6.6633%)	⬆️

[Rustin170506]

Looks good to me. Thanks! 👍

[Rustin170506]

Suggested change

	util2 "github.com/pingcap/tidb/pkg/statistics/handle/util"
	statsutil "github.com/pingcap/tidb/pkg/statistics/handle/util"

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-09-29 03:14:29.364176493 +0000 UTC m=+151824.784389500: ☑️ agreed by fzzf678.
• 2024-09-29 07:00:44.965077804 +0000 UTC m=+165400.385290816: ☑️ agreed by Rustin170506.

[lance6716]

/hold

[lance6716]

/retest

[tiprow]

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[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: fzzf678, Rustin170506

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[Rustin170506]

/unhold