executor: fix data race in the IndexNestedLoopHashJoin (#31731)

[ti-srebot]

cherry-pick #31731 to release-5.3
You can switch your code base to this Pull Request by using git-extras:

# In tidb repo:
git pr https://github.com/pingcap/tidb/pull/31756

After apply modifications, you can push your change to this PR via:

git push [email protected]:ti-srebot/tidb.git pr/31756:release-5.3-ca7ff0a04eb7

---

What problem does this PR solve?

Issue Number: close #31467

Problem Summary:
Enable failpoint and test race for the test TestIssue31129, it will failed.

What is changed and how it works?

handleTask will handle the error when keepOuterOrder is true.
We shouldn't handle it again.

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

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

None

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• guo-shaoge
• hawkingrei

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[ti-chi-bot]

@ti-srebot: This cherry pick PR is for a release branch and has not yet been approved by release team.
Adding the do-not-merge/cherry-pick-not-approved label.

To merge this cherry pick, it must first be approved by the collaborators.

AFTER it has been approved by collaborators, please ping the release team in a comment to request a cherry pick review.

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[ti-srebot]

/run-all-tests

[ti-srebot]

@wshwsh12 you're already a collaborator in bot's repo.

[guo-shaoge]

@wshwsh12 remainder~

[XuHuaiyu]

Cherry-pick in #31448 since this data race is detected by the test case added in that commit.

[ti-chi-bot]

@ti-srebot: PR needs rebase.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.