[BUG] JSONObjectTest3C.java failed on fastjson compatible

### 问题描述
[https://github.com/alibaba/fastjson2/blob/main/core/src/test/java/com/alibaba/fastjson2/v1issues/JSONObjectTest3C.java](url)
使用fastjson兼容无法通过，fastjson 1.x可以通过。
非标场景请考虑酌情修复吧

### 环境信息

- OS信息： [e.g.：CentOS 8.4.2105 4Core 3.10GHz 16 GB]
- JDK信息： [e.g.：Openjdk 1.8.0_312]
- 版本信息：[e.g.：Fastjson2 2.x.x]

### 相关日志输出
com.alibaba.fastjson2.JSONException: This method 'xx' is not a getter/getter/an illegal getter

Start by reading core/src/test/java/com/alibaba/fastjson2/v1issues/JSONObjectTest3C.java and run that test with fastjson compatibility enabled. Compare its behavior with fastjson 1.x and determine the expected handling for the reported non-getter exception; done means the compatibility test passes with the agreed behavior.

Written by the indexing model from the issue text.