Fixes Azure blob download as class is no longer hashable (kubeflow#1971)

Signed-off-by: Zhongcheng Lao <Zhongcheng.Lao@microsoft.com>

python/kserve/kserve/storage.py

@@ -226,7 +226,7 @@ def _download_blob(uri, out_dir: str):  # pylint: disable=too-many-locals
                 else:
                     blobs += container_client.list_blobs(name_starts_with=item.name,
                                                          include=['snapshots'])
-        for blob in set(blobs):
+        for blob in blobs:
             dest_path = os.path.join(out_dir, blob.name.replace(prefix, "", 1).lstrip("/"))
             Path(os.path.dirname(dest_path)).mkdir(parents=True, exist_ok=True)
             logging.info("Downloading: %s to %s", blob.name, dest_path)