Incorrect TS1111 when using private generator function in JS

### 🔎 Search Terms

An error TS1111 is raised when (properly) using a private generator function. I'm using VSCode, and it will report `Private field '#iterate' must be declared in an enclosing class.` when calling `child.#iterate()`.

### 🕗 Version & Regression Information

- I'm hitting this in VSCode 1.135.0

### 💻 Code

```js
class Foo {
*iterate() {
yield* this.#iterate()
}

*#iterate() {
const child = this.child
if (child instanceof this.constructor) {
yield* child.#iterate()
}
}
}

let f = new Foo()
for (const i of f.iterate()) {

}
```

### 🙁 Actual behavior

An error TS1111 is raised.

### 🙂 Expected behavior

There should be no error.

### Additional information about the issue

1. The error disappears if I call `this.#iterate()`, but of course that's not the point.
2. I can also clear the error by adding `assert(#iterate in child)` before the call

No source file or test is named. Start by reproducing the TS1111 diagnostic from the provided private-generator example in VSCode 1.135.0, then trace the compiler's private-field checking for the `child.#iterate()` call. Done means the example produces no error and a regression test covers the valid access.

Written by the indexing model from the issue text.