[Bug] [connector]][rocketmq] rocketmq如果offset模式中，offset传入-1报错

### Search before asking

- [X] I had searched in the [issues](https://github.com/DTStack/chunjun/issues) and found no similar issues.

### What happened

rocketmq如果offset模式中，offset传入-1报错，通过代码查看offset赋值有问题

### What you expected to happen

--

### How to reproduce

--

### Anything else

_No response_

### Version

master

### Are you willing to submit PR?

- [ ] Yes I am willing to submit a PR!

### Code of Conduct

- [X] I agree to follow this project's [Code of Conduct](https://www.apache.org/foundation/policies/conduct)