copIterator: return context error to avoid return incorrect result on context cancel/timeout (#53489)

[ti-chi-bot]

This is an automated cherry-pick of #53489

What problem does this PR solve?

Issue Number: close #50089 #55500

Problem Summary:

What changed and how does it work?

always return context error when recvFromRespCh return closed=true

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

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

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Additional details and impacted files

@@               Coverage Diff                @@
##             release-7.1     #55637   +/-   ##
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  Coverage               ?   73.4552%           
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  Files                  ?       1211           
  Lines                  ?     380565           
  Branches               ?          0           
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  Hits                   ?     279545           
  Misses                 ?      83173           
  Partials               ?      17847           

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: D3Hunter, joccau

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• OWNERS [D3Hunter,joccau]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-09-14 05:00:10.020552881 +0000 UTC m=+678079.760976811: ☑️ agreed by D3Hunter.
• 2024-09-14 05:56:03.406375243 +0000 UTC m=+681433.146799175: ☑️ agreed by joccau.