fix(language-core): intersect type of object key on v-for with string

[KazariEX]

fix vuejs/core#12318

[pkg-pr-new]

Open in Stackblitz

vue-component-meta

pnpm add https://pkg.pr.new/vuejs/language-tools/vue-component-meta@4981

vue-component-type-helpers

pnpm add https://pkg.pr.new/vuejs/language-tools/vue-component-type-helpers@4981

@vue/language-plugin-pug

pnpm add https://pkg.pr.new/vuejs/language-tools/@vue/language-plugin-pug@4981

@vue/language-core

pnpm add https://pkg.pr.new/vuejs/language-tools/@vue/language-core@4981

@vue/language-server

pnpm add https://pkg.pr.new/vuejs/language-tools/@vue/language-server@4981

@vue/language-service

pnpm add https://pkg.pr.new/vuejs/language-tools/@vue/language-service@4981

vue-tsc

pnpm add https://pkg.pr.new/vuejs/language-tools/vue-tsc@4981

@vue/typescript-plugin

pnpm add https://pkg.pr.new/vuejs/language-tools/@vue/typescript-plugin@4981

commit: ab40271