Fix name of the (all) reduction operation

Author: cphyc

yt/utilities/parallel_tools/parallel_analysis_interface.py

@@ -598,7 +598,7 @@ def parallel_objects(
             case "cat_on_root":
                 new_storage = my_communicator.concat(to_share, root=0)
             case "sum" | "max" | "min":
-                new_storage = my_communicator.reduce(to_share, op=reduction, root=0)
+                new_storage = my_communicator.all_reduce(to_share, op=reduction)
             case _:
                 raise NotImplementedError(
                     f"Reduction operation {reduction} not implemented."
@@ -947,7 +947,7 @@ def mpi_allreduce(self, data, dtype=None, op="sum"):
             # relatively small ( < 1e7 elements )
             return self.comm.allreduce(data, op)
 
-    def reduce(self, data, op="sum", root=0):
+    def all_reduce(self, data, op="sum"):
         reduction_op = {
             "sum": np.sum,
             "max": np.max,