wrong juliapkg.json path found

this is just a standard python package setup as following

```
.
├── README.md
├── juliapkg.json
├── pdm.lock
├── pdm_build.py
├── pyproject.toml
├── src
│ └── bloqade
│ ├── __init__.py
└── tests
├── __init__.py
├── test_scalar.py
└── test_shape.py
```

where in the `bloqade` module, it calls `juliacall`, directly running `python test_shape.py` will not use `juliapkg.json` but creates an empty new one. This behavior does not look right.

This is causing things like `pytest` not working