'@operator call' only supports a single argument

还没有人认领这个 Issue。

### 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?

Annotations

### Expected Behaviour

When using the
```
---@operator call([...])
```
annotation, any number of arguments should be permitted, like with the normal `fun([...])` annotation.

### Actual Behaviour

Writing something like
```
---@operator call(string, string)
```
causes a syntax error,

### Reproduction steps

1. Define a custom class with a custom `@operator call` annotation:
```
---@class MyTestClass
---@operator call(string, string)
```

### Additional Notes

The exact error is: `')' expected.Lua Syntax Check.(luadoc-miss-symbol)`

### Log File

_No response_

首先复现提供的 `MyTestClass` 示例，并在注解处理部分搜索 `@operator call`。当带两个参数的注解能够在没有 `luadoc-miss-symbol` 的情况下被接受，同时现有的单参数形式仍能正常工作时，即表示完成。

由索引模型根据 Issue 内容生成。