br: have better crypter key error msg

[Tristan1900]

What problem does this PR solve?

Issue Number: close #56388

Problem Summary:

What changed and how does it work?

1. checks the error of decoding hex format on crypto key and return a customized error indicating the hex format is not valid
2. added tests to verify that

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

Attention: Patch coverage is 41.66667% with 21 lines in your changes missing coverage. Please review.

Project coverage is 56.9643%. Comparing base (0f6bddd) to head (e4f537d).
Report is 40 commits behind head on master.

Additional details and impacted files

@@                Coverage Diff                @@
##             master     #56589         +/-   ##
=================================================
- Coverage   73.3958%   56.9643%   -16.4316%     
=================================================
  Files          1628       1753        +125     
  Lines        449554     635812     +186258     
=================================================
+ Hits         329954     362186      +32232     
- Misses        99344     249136     +149792     
- Partials      20256      24490       +4234     

Flag	Coverage Δ
integration	37.9487% <41.6666%> (?)
unit	72.5124% <22.2222%> (-0.0059%)	⬇️

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	63.1151% <41.6666%> (+17.5203%)	⬆️

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: YuJuncen

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• br/OWNERS [YuJuncen]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-10-16 02:00:12.541936913 +0000 UTC m=+409209.690846745: ☑️ agreed by YuJuncen.

[Tristan1900]

/retest

[tiprow]

@Tristan1900: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

In response to this:

/retest

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