Can't mock magic methods for \Aws\S3\S3Client

\Aws\S3\S3Client has way too many magic, e.g. for method `putObject()`
So when I try to mock this method it's treated as a property. Possible solution is to explicitly specify if it's a method or a property:
```
\Codeception\Stub::makeEmpty(
\Aws\S3\S3Client::class,
[
'putObject()' => 'result',
],
);
```

从 Codeception\Stub::makeEmpty 开始，跟踪所提供的 putObject() 条目如何针对 Aws\S3\S3Client 进行解释。复现该 mocking 场景，然后验证显式方法语法会被作为方法处理，同时现有的属性 stubbing 保持不变。

由索引模型根据 Issue 内容生成。