BUG: `TINYINT(1)` fields in `MYSQL` are parsed as `BIT`, resulting in the value in `UNDO_LOG` is not equals the value in db.

- [ ] 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
`TINYINT(1)` fields in `MYSQL` are parsed as `BIT`, resulting in the value in `UNDO_LOG` is not equals the value in db.
在MYSQL中类型为 `TINYINT(1)` 的字段，被解析为 `BIT` 类型，导致保存进 `UNDO_LOG` 中的值为布尔型不等于数据库中的值，最终，导致回滚后的值，要么是0，要么是1。

**表结构截图：**

**DEBUG字段类型截图：**

**DEBUG获取到的字段值截图：**

### 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

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: 1.8.0
- Database version: MYSQL
- OS(e.g. `uname -a`):
- Others: