Fails to convert a test that contains an inner arrow function and incorrectly converts a test that has an inner function

(Note the examples below are not my actual tests but the simplest form in which I could repo the issue.)

**Problem:**

1. If my test contains an inner arrow function like `() => {}` or `() => returnValue` then the converter does not identify the test as one needing updates.
2. If my test contains an inner function like `function(arg1) {return returnValue}` then the converter converts the args of the inner function too! (which isn't correct)

**Arrow function example:**
```
Scenario('myTest', async function (I) {
const myList = ['#1', '#2', '#3'];
myList.forEach((x) => '1');
})
```

_Output_:
1 unmodified
(no change to test)

**function example:**
```
Scenario('myTest', async function (I) {
const myList = ['#1', '#2', '#3'];
myList.forEach(function (x) {return '1'});
})
```

_Output_:
1 ok
```
Scenario('myTest', async function ({ I }) {
const myList = ['#1', '#2', '#3'];
myList.forEach(function ({ x }) {return '1'});
})
```

首先定位用于识别 Scenario 回调并重写其参数的转换器逻辑，然后复现 issue 中嵌套箭头函数和嵌套函数的示例。当包含内部箭头函数的测试能够完成转换，同时内部函数的参数保持不变时，即视为完成。

由索引模型根据 Issue 内容生成。