fix: SegFault when a MPI rank has no data of a sub-region #9956

Job	Run time
semantic_pull_request	3s
is_not_draft_pull_request	45s
if_not_unassigned_pull_request	2s
are_submodules_in_sync	13s
baseline_log	6s
code_coverage / build_test_deploy	5s
Check code style / build_test_deploy	1m 29s
Check documentation / build_test_deploy	1m 15s
Ubuntu (20.04, gcc 10.5.0, open-mpi 4.0.3) - github codespaces / build_test_deploy	1h 2m 31s
Sherlock CPU (centos 7.9.2009, gcc 10.1.0, open-mpi 4.1.2, openblas 0.3.10) / build_test_deploy	1h 16m 22s
Ubuntu (20.04, gcc 9.4.0, open-mpi 4.0.3) / build_test_deploy	1h 9m 1s
Ubuntu (22.04, clang 15.0.7, open-mpi 4.1.2) / build_test_deploy	1h 1m 2s
Ubuntu (22.04, gcc 11.4.0, open-mpi 4.1.2) / build_test_deploy	1h 2m 18s
Ubuntu (22.04, gcc 12.3.0, open-mpi 4.1.2) / build_test_deploy	1h 12m 18s
Pangea 3 CUDA (AlmaLinux 8.8, gcc 9.4.0, open-mpi 4.1.2, cuda 11.5.0, openblas 0.3.10) / build_test_deploy	9s
Ubuntu debug (20.04, gcc 10.5.0, open-mpi 4.0.3) - github codespaces / build_test_deploy	50m 3s
Rockylinux CUDA (8, clang 17.0.6, cuda 12.5.1) / build_test_deploy	6s
Rockylinux CUDA (8, gcc 8.5, cuda 12.5.1) / build_test_deploy	11s
Ubuntu CUDA (20.04, clang 10.0.0 + gcc 9.4.0, open-mpi 4.0.3, cuda-11.8.89) / build_test_deploy	6s
Sherlock GPU (centos 7.9.2009, gcc 10.1.0, open-mpi 4.1.2, openblas 0.3.10, cuda 12.4.0,) / build_test_deploy	24s
Ubuntu CUDA debug (20.04, clang 10.0.0 + gcc 9.4.0, open-mpi 4.0.3, cuda-11.8.89) / build_test_deploy	25s
run_integrated_tests / build_test_deploy	36m 57s
check_that_all_jobs_succeeded	1s
	8h 15m 52s

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