executor: add an unalignment load test for hash join v2

[windtalker]

What problem does this PR solve?

Issue Number: ref #53127

Problem Summary:

Hash join v2 use unalignment load during join probe, this pr add an unalignment load test.

What changed and how does it work?

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 @windtalker. Thanks for your PR.

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[xzhangxian1008]

LGTM

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: xzhangxian1008
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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2025-05-22 04:02:46.816481904 +0000 UTC m=+65071.233541468: ☑️ agreed by xzhangxian1008.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.5592%. Comparing base (c85f333) to head (6afcb51).
Report is 1 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #61257        +/-   ##
================================================
+ Coverage   73.1573%   73.5592%   +0.4018%     
================================================
  Files          1726       1726                
  Lines        478098     478136        +38     
================================================
+ Hits         349764     351713      +1949     
+ Misses       106869     104968      -1901     
+ Partials      21465      21455        -10     

Flag	Coverage Δ
integration	42.5477% <ø> (?)
unit	72.4275% <ø> (+0.0048%)	⬆️

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

Components	Coverage Δ
dumpling	52.7804% <ø> (ø)
parser	∅ <ø> (∅)
br	47.5887% <ø> (+0.0081%)	⬆️

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