[BUG] 数组、实体对象等非基本类型和String 作为Map.key时，开启AutoType，序列化后，反序列化报错

### 问题描述
*简要描述您碰到的问题。*
数组、实体对象等非基本类型和String 作为Map.key时，开启AutoType，序列化后，如果未指定具体的目标类型，则反序列化报错
### 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 2.0.61]

### 重现步骤
*如何操作可以重现该问题：*
```java
public void testEntityKeyEncode() {
Map map = new HashMap<>();
map.put(new TestKey(1), "value1");
map.put(new TestKey(2), "value2");
String jsonString = JSONUtil.encode(map);
System.out.println(jsonString);
Object jasonObject = JSONObject.parseObject(jsonString, Object.class, Feature.AllowUnQuotedFieldNames);

System.out.println(JSONObject.toJSONString(jasonObject));
Object object = JSONUtil.decode(jsonString, new com.alibaba.fastjson2.TypeReference>() {
});
String jsonString2 = JSONUtil.toJSONString(object);
System.out.println(jsonString2);

Object jasonObject3 = JSONUtil.decode(jsonString, Map.class);
String jsonString3 = JSONUtil.toJSONString(jasonObject3);
System.out.println(jsonString3);
}

public void testArrayKeyEncode() {
Map map = new HashMap<>();
map.put(new Integer[]{1, 2}, "value1");
map.put(new Integer[]{3, 4}, "value2");
String jsonString = JSONUtil.encode(map);
System.out.println(jsonString);
Object jasonObject = JSONObject.parseObject(jsonString, Object.class, Feature.AllowUnQuotedFieldNames);

System.out.println(JSONObject.toJSONString(jasonObject));
Object object = JSONUtil.decode(jsonString, new com.alibaba.fastjson2.TypeReference>() {
});
String jsonString2 = JSONUtil.toJSONString(object);
System.out.println(jsonString2);

Object jasonObject3 = JSONUtil.decode(jsonString, Map.class);
String jsonString3 = JSONUtil.toJSONString(jasonObject3);
System.out.println(jsonString3);
}

public static String encode(Object object) {
// 要避免String类型 再次被包装
if (object instanceof String) {
return (String) object;
}
return JSONObject.toJSONString(object
, Feature.WriteClassName
, Feature.IgnoreErrorGetter
, Feature.FieldBased
, Feature.WriteNonStringKeyAsString
);
}

public static T decode(String s, Class t) {
s = JediStrUtil.isEmpty(s) ? null : s;
return JSON.parseObject(s, t
, autoTypeBeforeHandler
, JSONReader.Feature.FieldBased
, JSONReader.Feature.IgnoreAutoTypeNotMatch
, JSONReader.Feature.UseNativeObject
, JSONReader.Feature.SupportClassForName
, JSONReader.Feature.AllowUnQuotedFieldNames
);
}

public static class TestKey {
int id;

public TestKey(int id) {
this.id = id;
}
}
```

### 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。*
能够根据ClassName 正确解析成指定的对象

### 相关日志输出
*请复制并粘贴任何相关的日志输出。*
```
{"@type":"java.util.HashMap",[3,4]:"value2",[1,2]:"value1"}
{"@type":"java.util.HashMap",[3,4]:"value2",[1,2]:"value1"}
{[1,2]:"value1",[3,4]:"value2"}

com.alibaba.fastjson2.JSONException: illegal input, offset 30, character [, line 1, column 30, fastjson-version 2.0.61 {"@type":"java.util.HashMap",[3,4]:"value2",[1,2]:"value1"}

at com.alibaba.fastjson2.JSONReader.readFieldNameUnquote(JSONReader.java:1697)
at com.alibaba.fastjson2.JSONReader.read(JSONReader.java:3485)
at com.alibaba.fastjson2.reader.ObjectReaderImplMap.readObject(ObjectReaderImplMap.java:453)
at com.alibaba.fastjson2.JSON.parseObject(JSON.java:1034)
at com.jedi.framework.utils.JSONUtil.decode(JSONUtil.java:183)
at com.jedi.framework.utils.JSONUtilTest.testArrayKeyEncode(JSONUtilTest.java:158)

{"@type":"java.util.HashMap",{"@type":"com.jedi.framework.utils.JSONUtilTest$TestKey","id":1}:"value1",{"@type":"com.jedi.framework.utils.JSONUtilTest$TestKey","id":2}:"value2"}
{"@type":"java.util.HashMap",{"@type":"com.jedi.framework.utils.JSONUtilTest$TestKey","id":1}:"value1",{"@type":"com.jedi.framework.utils.JSONUtilTest$TestKey","id":2}:"value2"}
{{"id":1}:"value1",{"id":2}:"value2"}

com.alibaba.fastjson2.JSONException: illegal input, offset 30, character {, line 1, column 30, fastjson-version 2.0.61 {"@type":"java.util.HashMap",{"@type":"com.jedi.framework.utils.JSONUtilTest$TestKey","id":1}:"value1",{"@type":"com.jedi.framework.utils.JSONUtilTest$TestKey","id":2}:"value2"}

at com.alibaba.fastjson2.JSONReader.readFieldNameUnquote(JSONReader.java:1697)
at com.alibaba.fastjson2.JSONReader.read(JSONReader.java:3485)
at com.alibaba.fastjson2.reader.ObjectReaderImplMap.readObject(ObjectReaderImplMap.java:453)
at com.alibaba.fastjson2.JSON.parseObject(JSON.java:1034)
at com.jedi.framework.utils.JSONUtil.decode(JSONUtil.java:183)
```

#### 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 failing testEntityKeyEncode and testArrayKeyEncode cases in JSONUtilTest, then trace the reported stack through JSON.parseObject, JSONReader.readFieldNameUnquote, and ObjectReaderImplMap.readObject. Reproduce the failures for array and entity-object map keys with AutoType enabled; done means both cases deserialize according to their ClassName without the reported illegal-input errors.

Written by the indexing model from the issue text.