external: improve S3 error message

[lance6716]

What problem does this PR solve?

Issue Number: close #59326

Problem Summary:

What changed and how does it work?

simply use %s instead of %v when printf

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 46.66667% with 8 lines in your changes missing coverage. Please review.

Project coverage is 74.9962%. Comparing base (4734c9c) to head (a1f6cb8).
Report is 108 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #59327        +/-   ##
================================================
+ Coverage   73.0474%   74.9962%   +1.9487%     
================================================
  Files          1689       1736        +47     
  Lines        467010     475785      +8775     
================================================
+ Hits         341139     356821     +15682     
+ Misses       104891      96584      -8307     
- Partials      20980      22380      +1400     

Flag	Coverage Δ
integration	48.9662% <0.0000%> (?)
unit	72.4125% <46.6666%> (+0.1747%)	⬆️

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

Components	Coverage Δ
dumpling	52.6910% <ø> (ø)
parser	∅ <ø> (∅)
br	61.2454% <46.6666%> (+15.8224%)	⬆️

[zimulala]

LGTM

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: D3Hunter, zimulala

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2025-02-08 02:33:15.059846882 +0000 UTC m=+64637.456068940: ☑️ agreed by D3Hunter.
• 2025-02-08 02:50:19.124197223 +0000 UTC m=+65661.520419285: ☑️ agreed by zimulala.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.5: #59749.