store/copr: revert pr/35975, do not reduce concurrency for keep order coprocessor request (#55141)

[tiancaiamao]

What problem does this PR solve?

Issue Number: close #54969

Problem Summary:

What changed and how does it work?

Cherry-pick #55141 to provide a hotfix on v7.1

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 @tiancaiamao. Thanks for your PR.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Please upload report for BASE (release-7.1-20240802-v7.1.5@caa60c0). Learn more about missing BASE report.

Additional details and impacted files

@@                       Coverage Diff                        @@
##             release-7.1-20240802-v7.1.5     #55155   +/-   ##
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[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Defined2014, lcwangchao

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-08-02 06:19:06.574681871 +0000 UTC m=+70343.793443464: ☑️ agreed by lcwangchao.
• 2024-08-02 06:45:07.341750485 +0000 UTC m=+71904.560512089: ☑️ agreed by Defined2014.