Functions emulator path doesn't match real executor path

### [REQUIRED] Environment info

**firebase-tools:** 9.2.2

**Platform:** WSL v2 Debian

### [REQUIRED] Test case

```
import * as functions from "firebase-functions";
import express from "express";

const app = express();

app.post("/api/test", async (req, res) => {
console.log("hooray");
});

export const api = functions.https.onRequest(app);
```

### [REQUIRED] Steps to reproduce

Run the above test case, visit `.../api/test`.

### [REQUIRED] Expected behavior

`.../api/test` should work.

### [REQUIRED] Actual behavior

If I visit this in prod functions it works, however on the emulator it requires that I visit `.../api/api/test`.