sinkV2(ticdc): sink manager close the sink factory at the last (#8219)

[ti-chi-bot]

This is an automated cherry-pick of #8219

What problem does this PR solve?

Issue Number: close #8216

What is changed and how it works?

When close the sink manager, close the sink factory at the last, after make sure all sink workers exited.

Check List

Tests

• 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

`None`

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[3AceShowHand]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 9262bab

[3AceShowHand]

/merge

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/run-verify-ci

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (release-6.6@d837794). Click here to learn what that means.
The diff coverage is n/a.

❗ Current head fc37386 differs from pull request most recent head 9262bab. Consider uploading reports for the commit 9262bab to get more accurate results

Additional details and impacted files

Flag	Coverage Δ
cdc	64.6257% <0.0000%> (?)
dm	53.2562% <0.0000%> (?)
engine	65.3006% <0.0000%> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

@@               Coverage Diff                @@
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/run-verify-ci

[3AceShowHand]

/run-kafka-integration-test