Fix py-torch: Enable tensorpipe

Importing torch yields an ImportError caused by some mismatch between
build options (distributed is enabled, but tensorpipe is not →
this seems unsupported → enable tensorpipe).

Related to: https://support.humanbrainproject.eu/#ticket/zoom/14319

spack.yaml

@@ -43,7 +43,7 @@ spack:
     - py-hippounit@1.3.6
     - py-efel@4.0.4
     - py-hbp-neuromorphic-platform@0.10.1
-    - py-torch~cuda~rocm~valgrind~mkldnn~mpi~gloo~tensorpipe~onnx_ml@1.9.1 ^protobuf@:3.17.999
+    - py-torch~cuda~rocm~valgrind~mkldnn~mpi~gloo+tensorpipe~onnx_ml@1.9.1 ^protobuf@:3.17.999
     - py-lfpy@2.2.6
     #- biobb-common
     # demo for codejam12