fix tiflash assert failure

[windtalker]

What problem does this PR solve?

Issue Number: ref #9430

Problem Summary:

What is changed and how it works?

Set cancellation hook after dry run of join->joinBlock so the dry run will always get a meaningfull block

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

[yibin87]

LGTM

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: gengliqi, yibin87

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• OWNERS [gengliqi,yibin87]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-09-23 03:01:16.040018973 +0000 UTC m=+1448545.780442926: ☑️ agreed by yibin87.
• 2024-09-23 03:12:53.949493177 +0000 UTC m=+1449243.689917117: ☑️ agreed by gengliqi.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-6.5: #9457.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.1: #9458.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.5: #9459.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-8.1: #9460.