feat(virtual-scroll): optimation changes

[necoxrr]

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Issue Number: N/A

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Does this PR introduce a breaking change?

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• No

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[github-actions]

[e2e-test-warn]
The component to be tested is missing.

The title of the Pull request should look like "fix(vue-renderless): [action-menu, alert] fix xxx bug".

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This branch is used for optimization and will not be merged yet.