perf(reactivity): do not track inner key __v_skip`

[zhangenming]

I don't think it's necessary to track his changes

[github-actions]

Size Report

Bundles

File	Size	Gzip	Brotli
runtime-dom.global.prod.js	99.1 kB (+36 B)	37.5 kB (+14 B)	33.8 kB (-3 B)
vue.global.prod.js	157 kB (+36 B)	57.3 kB (+16 B)	51 kB (-7 B)

Usages

Name	Size	Gzip	Brotli
createApp	54.5 kB (+36 B)	21.1 kB (+7 B)	19.3 kB (+53 B)
createSSRApp	58.5 kB (+36 B)	22.8 kB (+5 B)	20.7 kB (-3 B)
defineCustomElement	59.1 kB (+36 B)	22.6 kB (+4 B)	20.6 kB (+12 B)
overall	68.1 kB (+36 B)	26.2 kB (+15 B)	23.8 kB (-62 B)

[pkg-pr-new]

commit: b46d56f

@vue/compiler-core

pnpm add https://pkg.pr.new/@vue/compiler-core@11690

@vue/compiler-dom

pnpm add https://pkg.pr.new/@vue/compiler-dom@11690

@vue/compiler-sfc

pnpm add https://pkg.pr.new/@vue/compiler-sfc@11690

@vue/compiler-ssr

pnpm add https://pkg.pr.new/@vue/compiler-ssr@11690

@vue/reactivity

pnpm add https://pkg.pr.new/@vue/reactivity@11690

@vue/runtime-core

pnpm add https://pkg.pr.new/@vue/runtime-core@11690

@vue/runtime-dom

pnpm add https://pkg.pr.new/@vue/runtime-dom@11690

@vue/server-renderer

pnpm add https://pkg.pr.new/@vue/server-renderer@11690

@vue/shared

pnpm add https://pkg.pr.new/@vue/shared@11690

vue

pnpm add https://pkg.pr.new/vue@11690

@vue/compat

pnpm add https://pkg.pr.new/@vue/compat@11690

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