Test-Step: "Verify that a default interpreter has been selected that points to python interpreter in the .pixi\envs directory"

Testing #23674

```
Verify that a default interpreter has been selected that points to python interpreter in the .pixi\envs directory of the workspace. Its type should be Pixi.
```

How?

![image](https://github.com/user-attachments/assets/4de76cdf-5434-44a0-bd13-265c2f58c0a2)
