Add rule to require `static propTypes = ..` instad of `Foo.propTypes = ..` for class-based components

With such a rule the following would be invalid:

```javascript
class Foo extends React.Component {}
Foo.propTypes = {...}
Foo.defaultProps = {...}
```

and this would be valid:

```javascript
class Foo extends React.Component {
    static propTypes = {...};
    static defaultProps = {...};
}

function Bar() {
    return <>...</>;
}
Bar.propTypes = {...};
```