[BUG]项目resources下fastjson2.properties 里添加fastjson2.useJacksonAnnotation=false实际不生效

### 问题描述
*简要描述您碰到的问题。*
项目resources下fastjson2.properties 里添加fastjson2.useJacksonAnnotation=false实际不生效

### 环境信息
*请填写以下信息：*

- OS信息： [ openEuler 22.03 LTS SP1 16Core 2.10GHz 128 GB]
- JDK信息： [openjdk version "11.0.28" 2025-07-15]
- 版本信息：[Fastjson2 2.0.63]

### 重现步骤
*如何操作可以重现该问题：*
仅配置fastjson2.properties
```java
//useJacksonAnnotation = getPropertyBool(properties, "fastjson2.useJacksonAnnotation", true);
```
通过代码可以看到，getPropertyBool 先通过System.getProperty(name);获取参数，如果获取不到就直接返回默认值，不会从fastjson2.properties 文件获取配置
### 期待的正确结果
*由于项目是war部署，会存在多个应用，为了不影响其它应用。需要没有系统参数时从fastjson2.properties 获取*

### 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
*

*

Start by tracing the getPropertyBool call for fastjson2.useJacksonAnnotation and the loading path for fastjson2.properties. Reproduce the case with only the resource configuration and no system property; done means the resource value is honored while an explicitly supplied system property retains its intended precedence.

Written by the indexing model from the issue text.