expression, tests: move integration tests in expression pkg to tests/integration

[Defined2014]

What problem does this PR solve?

Issue Number: ref #46679

Problem Summary: mysql-tester already supported sorted_result, so move more test cases. Total test cases 9.

What is changed and how it works?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

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 @Defined2014. Thanks for your PR.

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[codecov]

Codecov Report

Merging #46891 (f26b1b7) into master (b7f0742) will decrease coverage by 0.5165%.
Report is 3 commits behind head on master.
The diff coverage is n/a.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #46891        +/-   ##
================================================
- Coverage   73.3727%   72.8562%   -0.5165%     
================================================
  Files          1328       1349        +21     
  Lines        397074     404237      +7163     
================================================
+ Hits         291344     294512      +3168     
- Misses        87135      91114      +3979     
- Partials      18595      18611        +16     

Flag	Coverage Δ
integration	27.8363% <ø> (?)
unit	73.4738% <ø> (+0.1011%)	⬆️

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

Components	Coverage Δ
dumpling	54.0444% <ø> (ø)
parser	85.0019% <ø> (+0.0107%)	⬆️
br	48.6719% <ø> (-4.1699%)	⬇️

[ti-chi-bot]

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[hawkingrei]

/retest

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hawkingrei, hi-rustin

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-09-12 06:56:26.482407646 +0000 UTC m=+338768.406964039: ☑️ agreed by hawkingrei.
• 2023-09-12 07:54:14.142925881 +0000 UTC m=+342236.067482273: ☑️ agreed by hi-rustin.