Warning is only generated for the first vararg parameter

まだ誰も着手していません。

### How are you using the lua-language-server?

Visual Studio Code Extension (sumneko.lua)

### Which OS are you using?

Windows

### What is the issue affecting?

Type Checking

### Expected Behaviour

Warning is generated for each argument with mismatched type for `---@vararg type` and '---@param ... type' annotations.

### Actual Behaviour

Warning generated only for the first passed argument.

### Reproduction steps

1. Paste following lua code into VSCode
```
---@param ... number
function Test(...) end
Test(1) -- OK, no warning
Test("1") -- OK, warning in place
Test(1, 2, 3) -- OK, no warnings
Test("1", "2", "3") -- There is only warning for "1" but no warning for "2" and "3". I.e. warning is only generated for the first argument
Test(1, "2", "3") -- still no warnings for "2" and "3".
```

### Additional Notes

I am observing the same behavior for legacy `---@varargs`

### Log File

_No response_

Visual Studio Code 拡張機能の例を再現し、通常の `---@param ... number` とレガシーの `---@varargs` を比較します。可変長引数呼び出しの型チェック経路を追跡し、両方のアノテーション形式で後続の引数も含め、各不一致引数が警告を生成することを確認します。

索引モデルが issue の本文から書いたものです。