Add rule for using PEP696 default type params

[PEP 696](https://peps.python.org/pep-0696) allows cleaning up code like

```py
from typing import Generator

def gen() -> Generator[int, None, None]:  # bad (on 3.13+)
    yield 42

def gen() -> Generator[int]:  # good
    yield 42
```

would be great if `ruff` had an auto-fix for that if the target version is at least 3.13