Add `ort_nightly_directml` to the `onnxruntime` candidates (#1458)

* Add `ort_nightly_directml` to the `onnxruntime` candidates

* style

src/diffusers/utils/import_utils.py

@@ -157,7 +157,13 @@ except importlib_metadata.PackageNotFoundError:
 _onnxruntime_version = "N/A"
 _onnx_available = importlib.util.find_spec("onnxruntime") is not None
 if _onnx_available:
-    candidates = ("onnxruntime", "onnxruntime-gpu", "onnxruntime-directml", "onnxruntime-openvino")
+    candidates = (
+        "onnxruntime",
+        "onnxruntime-gpu",
+        "onnxruntime-directml",
+        "onnxruntime-openvino",
+        "ort_nightly_directml",
+    )
     _onnxruntime_version = None
     # For the metadata, we have to look for both onnxruntime and onnxruntime-gpu
     for pkg in candidates: