[BUG]JSONException: level too large : 2048

### 问题描述
*您好，长链表结构序列化字符串报以下错误*
```
Exception in thread "main" com.alibaba.fastjson2.JSONException: level too large : 2048
at com.alibaba.fastjson2.JSONWriterUTF16.startObject(JSONWriterUTF16.java:87)
at com.alibaba.fastjson2.writer.OWG_1_4_FlameTreeNode.write(Unknown Source)
at com.alibaba.fastjson2.writer.FieldWriterList.writeList(FieldWriterList.java:253)
at com.alibaba.fastjson2.writer.OWG_1_4_FlameTreeNode.write(Unknown Source)
at com.alibaba.fastjson2.writer.FieldWriterList.writeList(FieldWriterList.java:253)
at com.alibaba.fastjson2.writer.OWG_1_4_FlameTreeNode.write(Unknown Source)
at com.alibaba.fastjson2.writer.FieldWriterList.writeList(FieldWriterList.java:253)
at com.alibaba.fastjson2.writer.OWG_1_4_FlameTreeNode.write(Unknown Source)
at com.alibaba.fastjson2.writer.FieldWriterList.writeList(FieldWriterList.java:253)
at com.alibaba.fastjson2.writer.OWG_1_4_FlameTreeNode.write(Unknown Source)
at com.alibaba.fastjson2.writer.FieldWriterList.writeList(FieldWriterList.java:253)
```

### 环境信息
*请填写以下信息：*

- OS信息： mac
- JDK信息： Openjdk 1.8.0_312
- 版本信息：fastjson 2.0.57

### 重现步骤
*如何操作可以重现该问题：*

1. 执行以下方法可复现
```java

public class FlameTreeNode {
private String n;
private long s;
private long v;
private List c;

public FlameTreeNode(String name, long self, long total) {
this.n = name;
this.s = self;
this.v = total;
this.c = new ArrayList();
}

public FlameTreeNode() {
}

public void addChild(FlameTreeNode child) {
this.c.add(child);
}

public String getN() {
return this.n;
}

public void setN(String n) {
this.n = n;
}

public long getS() {
return this.s;
}

public void setS(long s) {
this.s = s;
}

public long getV() {
return this.v;
}

public void setV(long v) {
this.v = v;
}

public List getC() {
return this.c;
}

public void setC(List c) {
this.c = c;
}

public int countNodes() {
int count = 1;

for(FlameTreeNode child : this.c) {
count += child.countNodes();
}

return count;
}

public static void main(String[] args) throws Exception {
FlameTreeNode root = new FlameTreeNode("test", 1, 1);
FlameTreeNode parent = root;
for (int i = 0; i < 2050; i++) {
FlameTreeNode item = new FlameTreeNode("test", 1, 1);
parent.addChild(item);
parent = item;
}
System.out.println(root.countNodes());
System.out.println(JSON.toJSONString(root));
}
}

```

### 期待的正确结果
*如果存在2048限制，是否可以通过方法配置maxLevel? 实际场景中存在不少超过此阈值的. 另我尝试用反射修改maxLevel，发现maxLevel貌似大于实际链表长度也不行，必须要大很多才行，麻烦帮忙看一下*

### 相关日志输出
*请复制并粘贴任何相关的日志输出。*

#### 附加信息
*此链表无循环*

Start with the supplied FlameTreeNode main and JSON.toJSONString call, then read JSONWriterUTF16.java and FieldWriterList.java around the reported stack frames. Trace how nesting depth is checked for a non-cyclic chain over 2048 levels. Done means the reproduction has a supported outcome and regression coverage or documented configuration addresses it.

Written by the indexing model from the issue text.