添加配置到etcd中运行脚本出现错误

- [ ] 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
使用sh命令运行etcd3-config.sh，向etcd3写入配置项

### Ⅱ. Describe what happened
配置项中过长的项会不能写入成功
If there is an exception, please attach the exception trace:

```
Complete initialization parameters, total-count:67 , failure-count:5
```

### Ⅲ. Describe what you expected to happen

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

### Ⅴ. Anything else we need to know?

### Ⅵ. Environment:

- JDK version :
- OS :
- Others:

Start with the etcd3-config.sh script and reproduce the reported initialization using configuration items with long values. Check why five of the 67 parameters fail to write, then verify that the full configuration initializes successfully without failures.

Written by the indexing model from the issue text.