fix(reactivity): enhance reactive function to handle skip objects

[linzhe141]

close #12807

[github-actions]

Size Report

Bundles

File	Size	Gzip	Brotli
runtime-dom.global.prod.js	100 kB (+15 B)	38 kB (+7 B)	34.3 kB (+14 B)
vue.global.prod.js	158 kB (+15 B)	57.8 kB (+4 B)	51.4 kB (-28 B)

Usages

Name	Size	Gzip	Brotli
createApp (CAPI only)	46.4 kB (+15 B)	18.2 kB (+5 B)	16.6 kB (+9 B)
createApp	54.3 kB (+15 B)	21.2 kB (+6 B)	19.3 kB (+14 B)
createSSRApp	58.5 kB (+15 B)	22.9 kB (+6 B)	20.9 kB (+12 B)
defineCustomElement	59.2 kB (+15 B)	22.8 kB (+6 B)	20.7 kB (-1 B)
overall	68.4 kB (+15 B)	26.3 kB (+5 B)	24 kB (+4 B)

[pkg-pr-new]

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@vue/compiler-core

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@vue/compiler-dom

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@vue/compiler-ssr

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@vue/reactivity

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@vue/compiler-sfc

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@vue/runtime-core

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@vue/runtime-dom

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@vue/server-renderer

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vue

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@vue/compat

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commit: e6d4fad