[BUG]BigDecimal BrowserCompatible下有些小数序列化为字符串 有些不是

### 问题描述
*简要描述您碰到的问题。*

### 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 1.8.0_312]
- 版本信息：[e.g.：Fastjson2 2.0.53]

### 重现步骤
*如何操作可以重现该问题：*

1. 使用 `xxx.xxx` 方法
2. 输入 `...` 数据
3. 出现 `...` 错误
```java
public static void main(String[] args) {
BigDecimal num1 = BigDecimal.valueOf(107.29305145106407);
BigDecimal num2 = BigDecimal.valueOf(23.42835970945431);
BigDecimal num3 = BigDecimal.valueOf(23.427479896686418);

Double num11 = 107.29305145106407;
Double num21 = 23.42835970945431;
Double num31 = 23.427479896686418;

Map map = new HashMap<>();
map.put("n1", num1);
map.put("n2", num2);
map.put("n3", num3);

map.put("n11", num11);
map.put("n21", num21);
map.put("n31", num31);

System.out.println(JSON.toJSONString(map));
System.out.println(JSON.toJSONString(map, JSONWriter.Feature.BrowserCompatible));
}
```

### 期待的正确结果
*对您期望发生的结果进行清晰简洁的描述。*

### 相关日志输出
*请复制并粘贴任何相关的日志输出。*
{"n1":107.29305145106407,"n2":23.42835970945431,"n3":23.427479896686418,"n21":23.42835970945431,"n31":23.427479896686418,"n11":107.29305145106407}
{"n1":"107.29305145106407","n2":23.42835970945431,"n3":"23.427479896686418","n21":23.42835970945431,"n31":23.427479896686418,"n11":107.29305145106407}

#### 附加信息
*如果你还有其他需要提供的信息，可以在这里填写（可以提供截图、视频等）。*

Start with the Java reproducer in the issue and trace the BrowserCompatible serialization path for BigDecimal and Double values. Compare the differing output cases and define the expected consistent behavior; done means the reproducer produces the intended JSON and has regression coverage.

Written by the indexing model from the issue text.