server: fix data race in the TestProxyProtocolWithIpNoFallbackable

[hawkingrei]

What problem does this PR solve?

Issue Number: close #51790

Problem Summary:

What changed and how does it work?

We should wait to complete the server init and start to get connection info.

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 #51791 (f8dec0e) into master (6306512) will increase coverage by 2.0575%.
Report is 9 commits behind head on master.
The diff coverage is n/a.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #51791        +/-   ##
================================================
+ Coverage   70.7550%   72.8125%   +2.0575%     
================================================
  Files          1476       1476                
  Lines        437535     437573        +38     
================================================
+ Hits         309578     318608      +9030     
+ Misses       108583      98941      -9642     
- Partials      19374      20024       +650     

Flag	Coverage Δ
integration	48.7775% <ø> (?)
unit	70.5164% <ø> (-0.0562%)	⬇️

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	51.4406% <ø> (+5.5044%)	⬆️

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Defined2014, xhebox

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-03-15 03:51:18.31818926 +0000 UTC m=+1003105.340435648: ☑️ agreed by Defined2014.
• 2024-03-15 04:10:38.096238102 +0000 UTC m=+1004265.118484490: ☑️ agreed by xhebox.