List available backend providers (ipex, openvino)

We are looking for a way how to find out which "backends" are available.

Is there an equivalent of:
```
import onnxruntime as ort

providers = ort.get_available_providers()
print(providers)
```

We don't have the luxury of trying out a OVAutoModel with openvino, notice its not available & then switch to the default Optimum model. Any way to detect this?

FYI: We are working on https://github.com/michaelfeil/infinity/pull/454.