ddl: simplify TestMDLPreparePlanCacheExecuteInsert

[D3Hunter]

What problem does this PR solve?

Issue Number: ref #56733

Problem Summary:

What changed and how does it work?

TestMDLPreparePlanCacheExecuteInsert is introduced in #57964, but the case is quite complex, harder to know which statement causes the issue

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]

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[D3Hunter]

bazel 8.0.0 just released today, The WORKSPACE file is disabled by default, so fix the version temporarily

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: tangenta, wjhuang2016

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• OWNERS [tangenta,wjhuang2016]
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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-12-10 03:26:11.13475872 +0000 UTC m=+322561.223561263: ☑️ agreed by wjhuang2016.
• 2024-12-10 03:39:34.403105042 +0000 UTC m=+323364.491907585: ☑️ agreed by tangenta.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 74.9094%. Comparing base (0ffac36) to head (c06074a).
Report is 7 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #58113        +/-   ##
================================================
+ Coverage   73.1496%   74.9094%   +1.7598%     
================================================
  Files          1675       1720        +45     
  Lines        461848     470002      +8154     
================================================
+ Hits         337840     352076     +14236     
+ Misses       103258      95751      -7507     
- Partials      20750      22175      +1425     

Flag	Coverage Δ
integration	49.0076% <ø> (?)
unit	72.2744% <ø> (-0.0065%)	⬇️

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	61.4788% <ø> (+15.4925%)	⬆️

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.5: #58125.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-8.5: #58133.