fix(types): reactive collection type is not as expected (#5954)

[hubvue]

fix: https://github.com/vuejs/core/issues/5954

When we explicitly declare the type for the argument to the reactive function:

interface WrapRef {
   foo: Ref<number>
}

const obj =  reactive<WrapRef>({
   foo: ref(1)
})

const map = reactive(new Map<string, WrapRef>())
map.set('a', {
   foo: ref(1)
})

The types of the map and set methods at this point are:

interface Map<K, V>{
   set(key: K, value: V): this;
}

I think the type of map as Map<string, WrapRef> is as expected.

The problem is that when using map.get to get a value, the ref value will automatically unref. So it is possible to handle it from the get method.

[netlify[bot]]

❌ Deploy Preview for vuejs-coverage failed.

Name	Link
🔨 Latest commit	13f636677af9f453a297d90e2125ae2b661813b5
🔍 Latest deploy log	https://app.netlify.com/sites/vuejs-coverage/deploys/62debe7b8dcbec00081c8b34

[hubvue]

The type checking from vscode is fine, but running pnpm run test-dts-only doesn't pass the type checking in tsconfig.build.json, so I'll see what the problem is tomorrow, and I'm going to bed now in order for k to work properly tomorrow.

[hubvue]

Writing declare global in a file is not visible to the user, which is somewhat problematic here.