fix(runtime-dom): make the rendering of <template> consistent with native behavior

[KazariEX]

fix #4613

I tried to fix the ssr behavior, but I couldn't solve the hydration mismatch no matter what 😄

[github-actions]

Size Report

Bundles

File	Size	Gzip	Brotli
runtime-dom.global.prod.js	101 kB (+79 B)	38.2 kB (+25 B)	34.4 kB (+63 B)
vue.global.prod.js	158 kB (+79 B)	58.3 kB	51.9 kB (+51 B)

Usages

Name	Size	Gzip	Brotli
createApp (CAPI only)	46.5 kB (+79 B)	18.2 kB (+30 B)	16.6 kB (+34 B)
createApp	54.5 kB (+79 B)	21.2 kB (+29 B)	19.4 kB (+36 B)
createSSRApp	58.7 kB (+79 B)	22.9 kB (+40 B)	20.9 kB (+24 B)
defineCustomElement	59.3 kB (+79 B)	22.7 kB (+22 B)	20.7 kB (+12 B)
overall	68.6 kB (+79 B)	26.4 kB (+27 B)	24 kB (+37 B)

[pkg-pr-new]

Open in StackBlitz

@vue/compiler-core

npm i https://pkg.pr.new/@vue/compiler-core@13200

@vue/compiler-dom

npm i https://pkg.pr.new/@vue/compiler-dom@13200

@vue/compiler-ssr

npm i https://pkg.pr.new/@vue/compiler-ssr@13200

@vue/compiler-sfc

npm i https://pkg.pr.new/@vue/compiler-sfc@13200

@vue/reactivity

npm i https://pkg.pr.new/@vue/reactivity@13200

@vue/runtime-core

npm i https://pkg.pr.new/@vue/runtime-core@13200

@vue/runtime-dom

npm i https://pkg.pr.new/@vue/runtime-dom@13200

@vue/server-renderer

npm i https://pkg.pr.new/@vue/server-renderer@13200

@vue/shared

npm i https://pkg.pr.new/@vue/shared@13200

vue

npm i https://pkg.pr.new/vue@13200

@vue/compat

npm i https://pkg.pr.new/@vue/compat@13200

commit: ed2f4ea