executor: Move sort tests to sortexec package

[xzhangxian1008]

What problem does this PR solve?

Issue Number: ref #47733

Problem Summary:

What is changed and how it works?

• Move TestSortSpillDisk in executor_pkg_test.go into sortexec package
• Move benchmark test of sort in benchmark_test.go into sortexec package
• Move some common test util into testutil package
• Move agg, limit, sort and window utilities into testutil package

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 @xzhangxian1008. Thanks for your PR.

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[hawkingrei]

/ok-to-test

[codecov]

Codecov Report

Merging #48636 (899f326) into master (15f7b6e) will increase coverage by 1.4254%.
Report is 7 commits behind head on master.
The diff coverage is 32.7800%.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #48636        +/-   ##
================================================
+ Coverage   71.2233%   72.6488%   +1.4254%     
================================================
  Files          1360       1389        +29     
  Lines        403758     410787      +7029     
================================================
+ Hits         287570     298432     +10862     
+ Misses        96260      93453      -2807     
+ Partials      19928      18902      -1026     

Flag	Coverage Δ
integration	43.3395% <0.4149%> (?)
unit	71.1858% <32.3651%> (-0.0376%)	⬇️

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

Components	Coverage Δ
dumpling	53.9874% <ø> (ø)
parser	∅ <ø> (∅)
br	48.8155% <ø> (-4.2467%)	⬇️

[xzhangxian1008]

/cc @SeaRise @hawkingrei

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hawkingrei, SeaRise

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• OWNERS [hawkingrei]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-11-17 02:59:32.319162272 +0000 UTC m=+4390769.906272416: ☑️ agreed by hawkingrei.
• 2023-11-17 03:04:00.079387638 +0000 UTC m=+4391037.666497783: ☑️ agreed by SeaRise.