Fix code hover for class type parameter references

Consider the following:
```groovy
class C <Item extends Type> {
  private List<Item> items
  void test() {
    items
  }
}
```

Hover display for "items" is missing type argument `<Item>`.

![image](https://user-images.githubusercontent.com/18193802/206918540-a3485bfc-2324-406f-97e4-5153cc915824.png)