seata-sdk2.0.0 kryo序列化模式下protocol class没有被注册成功

- [ ] I have searched the [issues](https://github.com/seata/seata/issues) of this repository and believe that this is not a duplicate.

### Ⅰ. Issue Description
seata-all 2.0.0
kryo序列化方式，客户端中SerializerSecurityRegistry#getProtocolType

file.exists() 这里返回false
### Ⅱ. Describe what happened

If there is an exception, please attach the exception trace:

```
Just paste your stack trace here!
```
java.lang.IllegalArgumentException: Class is not registered: io.seata.core.protocol.RegisterRMRequest
Note: To register this class use: kryo.register(io.seata.core.protocol.RegisterRMRequest.class);
at com.esotericsoftware.kryo.Kryo.getRegistration(Kryo.java:579) ~[kryo-5.4.0.jar:na]
at com.esotericsoftware.kryo.util.DefaultClassResolver.writeClass(DefaultClassResolver.java:112) ~[kryo-5.4.0.jar:na]
at com.esotericsoftware.kryo.Kryo.writeClass(Kryo.java:613) ~[kryo-5.4.0.jar:na]
at com.esotericsoftware.kryo.Kryo.writeClassAndObject(Kryo.java:708) ~[kryo-5.4.0.jar:na]
at io.seata.serializer.kryo.KryoInnerSerializer.serialize(KryoInnerSerializer.java:44) ~[seata-all-2.0.0.jar:2.0.0]
at io.seata.serializer.kryo.KryoSerializer.serialize(KryoSerializer.java:35) ~[seata-all-2.0.0.jar:2.0.0]
at io.seata.core.rpc.netty.v1.ProtocolV1Encoder.encode(ProtocolV1Encoder.java:96) ~[seata-all-2.0.0.jar:2.0.0]
at io.netty.handler.codec.MessageToByteEncoder.write(MessageToByteEncoder.java:107) [netty-all-4.1.50.Final.jar:4.1.50.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:717) [netty-all-4.1.50.Final.jar:4.1.50.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeWriteAndFlush(AbstractChannelHandlerContext.java:764) [netty-all-4.1.50.Final.jar:4.1.50.Final]
at io.netty.channel.AbstractChannelHandlerContext$WriteTask.run(AbstractChannelHandlerContext.java:1071) [netty-all-4.1.50.Final.jar:4.1.50.Final]
at io.netty.util.concurrent.AbstractEventExecutor.safeExecute$$$capture(AbstractEventExecutor.java:164) [netty-all-4.1.50.Final.jar:4.1.50.Final]
at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java) [netty-all-4.1.50.Final.jar:4.1.50.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:472) [netty-all-4.1.50.Final.jar:4.1.50.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:500) [netty-all-4.1.50.Final.jar:4.1.50.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989) [netty-all-4.1.50.Final.jar:4.1.50.Final]
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) [netty-all-4.1.50.Final.jar:4.1.50.Final]
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) [netty-all-4.1.50.Final.jar:4.1.50.Final]
at java.lang.Thread.run(Thread.java:750) [na:1.8.0_382]

### Ⅲ. Describe what you expected to happen

### Ⅳ. How to reproduce it (as minimally and precisely as possible)

1. xxx
2. xxx
3. xxx

Minimal yet complete reproducer code (or URL to code):

### Ⅴ. Anything else we need to know?

### Ⅵ. Environment:

- JDK version(e.g. `java -version`):
- Seata client/server version:
- Database version:
- OS(e.g. `uname -a`):
- Others: