avoid potential TiFlash crash in `NonJoinedBlockInputStream`

[windtalker]

What problem does this PR solve?

Issue Number: close #9190

Problem Summary: Hold shared pointer of Join in NonJoinedBlockInputStream

What is changed and how it works?

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[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

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

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files: - ~~[OWNERS](https://github.com/pingcap/tiflash/blob/release-6.5/OWNERS)~~ [gengliqi,yibin87] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment

[ti-chi-bot[bot]]

[LGTM Timeline notifier]

Timeline:

• 2024-08-26 07:08:24.664988648 +0000 UTC m=+767699.799438770: :ballot_box_with_check: agreed by gengliqi.
• 2024-08-26 07:12:46.334043399 +0000 UTC m=+767961.468493505: :ballot_box_with_check: agreed by yibin87.

[windtalker]

/run-all-tests

[windtalker]

/run-unit-tests

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-6.1: #9368.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-5.4: #9369.