Fix py-torch build (maybe)

mentioned in merge request !46 (merged)

The last build failed with:

  >> 7033    /tmp/spack/spack-stage/spack-stage-py-torch-1.9.1-sapxfgr2sdot32bm
             ek5zaa6ifs2iogtp/spack-src/torch/csrc/jit/ir/ir.cpp:1106:16: error
             : 'set_stream' is not a member of 'torch::jit::cuda'; did you mean
              'c10::cuda::set_stream'?

⇒ this is a rocm-related code path… disabling rocm (and MPI-related things too).

mentioned in commit d22686ec

merged

Success!! :)

https://gitlab.ebrains.eu/technical-coordination/project-internal/devops/platform/ebrains-spack-builds/-/jobs/20977