fix(web): correct node update ordering in web renderer

[godky]

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Currently, the value of index obtained directly in webRender is always undefined, causing inserted elements to always be placed at the end of the parent container, which is incorrect in v-if scenarios(vue-next).

Reproduce link.

[hippy-service]

Hi, @godky. Thanks for your PR! 👏

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[hippy-service]

After a quick scan, I have approved workflow to run.

Details

• SHA: 98789b4

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[godky]

Reproduce link