Consolidation with CDI-PIO (develop)

Generally, this is !11 (merged) rebased onto the develop branch.

This is the first develop-based version accepted by the Buildbot of ICON: https://buildbot.dkrz.de/grid?branch=m300488/cdi-pio-2-integration

tests/simple_model.c

@@ -298,7 +298,11 @@ modelRun(struct model_config setup, MPI_Comm comm)
                     exit(EXIT_FAILURE);
                   }
               }
-            fclose(tablefp);
+            if (fclose(tablefp) != 0)
+              {
+                perror("failed to close table file");
+                exit(EXIT_FAILURE);
+              }
           }
         }
     }