feat(Transition): add key to Transition props

[gucovip]

close #8682

[haoqunjiang]

/ecosystem-ci run

[github-actions]

Size Report

Bundles

File	Size	Gzip	Brotli
runtime-dom.global.prod.js	86.5 kB (+27 B)	32.9 kB (+13 B)	29.7 kB (-13 B)
vue.global.prod.js	132 kB (+27 B)	49.6 kB (+13 B)	44.6 kB (+123 B)

Usages

Name	Size	Gzip	Brotli
createApp	47.9 kB	18.9 kB	17.2 kB
createSSRApp	51.2 kB	20.2 kB	18.4 kB
defineCustomElement	50.3 kB	19.7 kB	17.9 kB
overall	61.3 kB (+27 B)	23.7 kB (+12 B)	21.6 kB (+44 B)

[vue-bot]

📝 Ran ecosystem CI: Open

suite	result	latest scheduled
language-tools	✅ success	✅ success
nuxt	✅ success	✅ success
pinia	✅ success	✅ success
quasar	✅ success	✅ success
router	✅ success	✅ success
test-utils	✅ success	✅ success
vant	✅ success	✅ success
vite-plugin-vue	✅ success	✅ success
vitepress	✅ success	✅ success
vue-i18n	✅ success	✅ success
vue-macros	✅ success	✅ success
vuetify	✅ success	✅ success
vueuse	✅ success	✅ success
vue-simple-compiler	✅ success	✅ success

[yyx990803]

#8682 (comment)