🐛 Bug: Using missingProperties with private class properties broken

### Bug Report Checklist

- [x] I have tried restarting my IDE and the issue persists.
- [x] I have pulled the latest `main` branch of the repository.
- [x] I have [searched for related issues](https://github.com/JoshuaKGoldberg/TypeStat/issues?q=is%3Aissue) and found none that matched my issue.

### Expected

```ts
class WaveTracker {
#previouslySeen = new Set();

#repeatedCount = 0;

addAndCheck() {
this.#repeatedCount = 0;
}
}
```

or

```ts
class WaveTracker {
#previouslySeen = new Set();

#repeatedCount: number = 0;

addAndCheck() {
this.#repeatedCount = 0;
}
}
```

### Actual

```ts
class WaveTracker {
#previouslySeen = new Set();

#repeatedCount = 0;
#repeatedCount: number;
#repeatedCount: number;
#repeatedCount: number;
#repeatedCount: number;
#repeatedCount: number;
#repeatedCount: number;
#repeatedCount: number;
#repeatedCount: number;
#repeatedCount: number;
#repeatedCount: number;
#repeatedCount: number;
#repeatedCount: number;
#repeatedCount: number;
#repeatedCount: number;
#repeatedCount: number;
#repeatedCount: number;
#repeatedCount: number;
#repeatedCount: number;
#repeatedCount: number;

addAndCheck() {
this.#repeatedCount = 0;
}
}
```

### Additional Info

This can be reproduced by adding below code to `missingPropertyAccess` test.

```ts
class WaveTracker {
#previouslySeen = new Set();

#repeatedCount = 0;

addAndCheck() {
this.#repeatedCount = 0;
}
}
```