fix(hydration): normalize text content to prevent false mismatch warnings

[jh-leong]

close #12535

Normalize text content during hydration to align with browser parsing behavior and prevent unnecessary mismatch warnings, inspired by React's approach.

[github-actions]

Size Report

Bundles

File	Size	Gzip	Brotli
runtime-dom.global.prod.js	100 kB (+128 B)	38 kB (+57 B)	34.3 kB (+73 B)
vue.global.prod.js	158 kB (+128 B)	57.9 kB (+71 B)	51.5 kB (+113 B)

Usages

Name	Size	Gzip	Brotli
createApp (CAPI only)	46.6 kB	18.3 kB	16.7 kB
createApp	54.6 kB	21.3 kB	19.4 kB
createSSRApp	58.8 kB (+128 B)	23 kB (+70 B)	21 kB (+51 B)
defineCustomElement	59.4 kB	22.8 kB	20.8 kB
overall	68.4 kB	26.4 kB	24 kB

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@vue/compiler-core

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@vue/runtime-core

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vue

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commit: a71360f