Remove OpenMPI? Default on system?

Author: ax3l

.github/ci/spack-envs/clang12_py38_mpich_h5_ad2/spack.yaml

@@ -15,7 +15,7 @@ spack:
       variants: +mpi ~zfp ~sz ~png ~dataman ~python ~fortran ~ssc ~shared ~bzip2 ~blosc2 ~mgard
     cmake:
       externals:
-      - spec: cmake@3.31.5
+      - spec: cmake@3.31.6
         prefix: /usr
       buildable: False
     hdf5:

.github/workflows/linux.yml

@@ -171,6 +171,7 @@ jobs:
     - name: Install
       run: |
         sudo apt-get update
+        sudo apt-get remove openmpi* libopenmpi* || true
         sudo apt-get install clang-12 gfortran libmpich-dev mpich python3
         sudo .github/workflows/dependencies/install_spack
     - name: Build