[BUG] Gbase8s 获取不到数据库类型

### Database Type

Gbase8s

### Database Version

Gbase8s

### Druid Version

1.2.23

### JDK Version

jdk8

### Error SQL

JdbcUtils.getDbTypeRaw 方法漏加Gbase8s 的类型判断，调用返回null


### Testcase Code

_No response_

### Stacktrace Info

_No response_

### Error Info

_No response_