When target: "esnext" and useDefineForClassFields: true, property
declaration initialisers should not be able to reference parameter
properties; class fields are initialised before the constructor runs,
but parameter properties are not:

```ts
class C {
  foo = this.bar
  constructor(public bar: string) { }
}
```

emits code that looks like this:

```js
class C {
  bar
  foo = this.bar
  constructor(bar) {
    this.bar = bar
  }
}
new C('x').foo.length // crashes; foo is undefined
```

This PR adds an error on foo's declaration with ESNext+[[Define]].