fix(server): single asset download with ignore_assets plugin setting (#…

…1199)

eodag/plugins/download/http.py

@@ -777,7 +777,10 @@ def _stream_download_dict(
             raise MisconfiguredError(f"Incompatible auth plugin: {type(auth)}")
 
         # download assets if exist instead of remote_location
-        if len(product.assets) > 0 and not getattr(self.config, "ignore_assets", False):
+        if len(product.assets) > 0 and (
+            not getattr(self.config, "ignore_assets", False)
+            or kwargs.get("asset") is not None
+        ):
             try:
                 assets_values = product.assets.get_values(kwargs.get("asset", None))
                 chunks_tuples = self._stream_download_assets(