AT 模式 insert ignore / insert on duplicate 回滚时会导致数据被错误删除

- [x] 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
insert sql，都没有生成 beforeImage；undo 时直接删除 afterImage中的主键相关行。会导致 insert ignore / insert on duplicate 没有真正插入数据时，一旦回滚，会造成数据被误删。

### Ⅱ. Describe what happened

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

```
Just paste your stack trace here!
```

### Ⅲ. Describe what you expected to happen

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

1. xxx
2. xxx
3. xxx

### Ⅴ. Anything else we need to know?

### Ⅵ. Environment:

- JDK version :
- OS :
- Others:

The report concerns AT-mode undo handling for INSERT SQL, specifically insert ignore and insert on duplicate. Start by reproducing the rollback case described; done means rollback no longer deletes an existing row when the insert did not actually add data. No source file or test is named, so the relevant implementation and regression test still need to be located.

Written by the indexing model from the issue text.