[BUG] JSON.parseObject with empty string and byte[].class

### 问题描述
#464 fastjson兼容 解析空字符串的byte[] 出现异常值

### 环境信息

- OS信息： [MacOS 12.7.4 M1 Pro 16 GB]
- JDK信息： [Openjdk 17.0.6]
- 版本信息：[Fastjson 2.0.51]

### 重现步骤

```java
import com.alibaba.fastjson.JSON;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.assertNull;

public class Issue464 {

@Test
public void test1() {
assertNull(JSON.parseObject("\"\"", byte[].class));
}
}

```

### 相关日志输出
Expected :null
Actual :[B@6c130c45

Start by running the Issue464 reproducer with Java, Fastjson 2.0.51, and the empty-string input passed to JSON.parseObject with byte[].class. Trace the byte[] deserialization behavior and add or update a regression test so the assertion returns null instead of a byte array.

Written by the indexing model from the issue text.