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

[Benjamin2037]

LGTM

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Benjamin2037, D3Hunter

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-08-26 06:40:54.398032706 +0000 UTC m=+766049.532482830: ☑️ agreed by D3Hunter.
• 2024-08-26 06:41:37.362945606 +0000 UTC m=+766092.497395728: ☑️ agreed by Benjamin2037.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

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Additional details and impacted files

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