*: set right concurrency when to auto-analyze

[hawkingrei]

What problem does this PR solve?

Issue Number: close #51749

Problem Summary:

What changed and how does it work?

the old control code is not deleted so it read the concurrency from wrong variable.

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

Merging #51748 (3755510) into master (47a990e) will increase coverage by 1.5567%.
Report is 3 commits behind head on master.
The diff coverage is 100.0000%.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #51748        +/-   ##
================================================
+ Coverage   70.7663%   72.3230%   +1.5567%     
================================================
  Files          1475       1475                
  Lines        437315     437303        -12     
================================================
+ Hits         309472     316271      +6799     
+ Misses       108511     100999      -7512     
- Partials      19332      20033       +701     

Flag	Coverage Δ
integration	27.8241% <100.0000%> (?)
unit	70.4842% <100.0000%> (-0.1035%)	⬇️

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

Components	Coverage Δ
dumpling	53.9957% <ø> (ø)
parser	∅ <ø> (∅)
br	51.4393% <ø> (+5.4974%)	⬆️

[hawkingrei]

/retest

[elsa0520]

LGTM

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: elsa0520, winoros

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-03-13 15:39:52.261408852 +0000 UTC m=+872819.283655258: ☑️ agreed by winoros.
• 2024-03-14 02:13:21.984347828 +0000 UTC m=+910829.006594216: ☑️ agreed by elsa0520.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.5: #53416.