Use the OpenMPI 5+ specific env variables for oversubscribing

Author: Thierry RAMORASOAVINA

.github/workflows/pip.yml

@@ -103,8 +103,10 @@ jobs:
           KHIOPS_PROC_NUMBER: 4
           # Oversubscribe for MPI 4.x
           rmaps_base_oversubscribe: true
-          # Oversubscribe for MPI > 4.x
+          # Oversubscribe for MPI < 5
           OMPI_MCA_rmaps_base_oversubscribe: true
+          # Oversubscribe for MPI >= 5
+          PRTE_MCA_rmaps_default_mapping_policy: :oversubscribe
         run: |-
           # Make sure MPI support is not loaded through env modules
           # Note: As the Docker container's shell is non-interactive, environment

.github/workflows/tests.yml

@@ -377,8 +377,10 @@ jobs:
           KHIOPS_SAMPLES_DIR: ${{ github.workspace }}/khiops-samples
           # Oversubscribe for MPI 4.x
           rmaps_base_oversubscribe: true
-          # Oversubscribe for MPI > 4.x
+          # Oversubscribe for MPI < 5
           OMPI_MCA_rmaps_base_oversubscribe: true
+          # Oversubscribe for MPI >= 5
+          PRTE_MCA_rmaps_default_mapping_policy: :oversubscribe
         run: |-
           # Reset the default 'exit-on-error' mode of the bash shell in Github actions
           # so that the return code can be evaluated if needed