sourcemanager(ticdc): close all pullers asyncrhonsly to prevent block too long

[3AceShowHand]

What problem does this PR solve?

Issue Number: ref #11638

What is changed and how it works?

Check List

Tests

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

Questions

Will it cause performance regression or break compatibility?

Do you need to update user documentation, design documentation or monitoring documentation?

Release note

Please refer to [Release Notes Language Style Guide](https://pingcap.github.io/tidb-dev-guide/contribute-to-tidb/release-notes-style-guide.html) to write a quality release note.

If you don't think this PR needs a release note then fill it with `None`.

[3AceShowHand]

/retest

[3AceShowHand]

/approve

[ti-chi-bot[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: 3AceShowHand, asddongmen, hicqu

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[ti-chi-bot[bot]]

[LGTM Timeline notifier]

Timeline:

• 2024-11-04 08:03:27.675632993 +0000 UTC m=+855320.514788539: :ballot_box_with_check: agreed by hicqu.
• 2024-11-04 08:04:26.207354529 +0000 UTC m=+855379.046510075: :ballot_box_with_check: agreed by asddongmen.