Readd py-torch with onnx_ml disabled

(The build failed in some onnx code path that seems to require a very old version of google protobuf…)

spack.yaml

@@ -32,5 +32,5 @@ spack:
     # demo for codejam12
     - funniest1022 %gcc@10.3.0
     # NRP
-    #- py-torch~mkldnn~cuda~cudnn %gcc@10.3.0
+    - py-torch~mkldnn~cuda~cudnn~onnx_ml %gcc@10.3.0
   concretization: together