tests: speed up integration test

[Defined2014]

What problem does this PR solve?

Issue Number: close #xxx

Problem Summary:

• remove some add index ddl, each one will reduce 2 seconds.
• combine insert into to one txn.
• remove some excessive data

There is a problem. Now after distask is enabled, adding an index to an empty table takes round 2 seconds, which will cause integrationtest to slow down.

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 @Defined2014. Thanks for your PR.

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[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-05-21 02:29:01.049277137 +0000 UTC m=+2138694.806412695: ☑️ agreed by hawkingrei.
• 2024-05-21 02:37:28.086441274 +0000 UTC m=+2139201.843576842: ☑️ agreed by xhebox.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.6556%. Comparing base (491740b) to head (bc52016).
Report is 18 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #53426        +/-   ##
================================================
+ Coverage   72.5147%   73.6556%   +1.1408%     
================================================
  Files          1498       1523        +25     
  Lines        429925     436966      +7041     
================================================
+ Hits         311759     321850     +10091     
+ Misses        98883      95144      -3739     
- Partials      19283      19972       +689     

Flag	Coverage Δ
integration	48.9376% <ø> (?)
unit	71.3545% <ø> (-0.0565%)	⬇️

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

Components	Coverage Δ
dumpling	53.9957% <ø> (ø)
parser	∅ <ø> (∅)
br	42.5310% <ø> (+0.9300%)	⬆️

[Defined2014]

/retest

[tiprow]

@Defined2014: 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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