[BUG] 静态内部类序列化报错

### 问题描述
*简要描述您碰到的问题。*
公共静态内部类序列化报错，间隔频率出现
TestContext 类定义在TestResponse 类里面
```java
class TestResponse {
private TestContext testContext = null;

public TestContext getTestContext () {
return testContext;
}

public void setTestContext(TestContext testContext ) {
this.testContext = testContext;
}

public static class TestContext{

public TestContext() {
}

private String userInfo = "";

public String getUserInfo() {
return userInfo;
}

public void setUserInfo(String userInfo) {
this.userInfo = userInfo;
}

}
```

### 环境信息
*请填写以下信息：*

- OS信息： [e.g.：CentOS 8.4.2105 4Core 3.10GHz 16 GB]
- JDK信息： [e.g.：Openjdk 17.0.5]
- 版本信息：[e.g.：Fastjson2 2.0.40]

```java
Class returnType = TestResponse.class;
T result = JSON.parseObject(JSON.toJSONBytes(payload), returnType);
```

### 相关日志输出
*请复制并粘贴任何相关的日志输出。*
java.lang.NoClassDefFoundError: com/test/TestResponse$TestContext
at com.alibaba.fastjson2.reader.ORG_55_2_TestResponse.readObject(Unknown Source)
at com.alibaba.fastjson2.JSON.parseObject(JSON.java:1365)
at java.base/java.util.concurrent.xecutors$RunnableAdapter.call(Executors.java:539)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.lang.Thread.run(Thread.java:833)
Caused by: java.lang.ClassNotFoundException: com.test.TestResponse$TestContext
... 16 common frames omitted

Start by reproducing the reported call using JSON.toJSONBytes(payload) and JSON.parseObject(..., TestResponse.class) with the nested static TestContext class. Inspect the generated ORG_55_2_TestResponse reader and the NoClassDefFoundError stack trace. Done means deserialization reliably succeeds without the missing TestResponse$TestContext class error.

Written by the indexing model from the issue text.