[NOMERGE] Production concatenate calls squashed

[MTCam]

Summarize concat/outlining changes only.

[MTCam]

FYI: I haven't been able tor run prediction driver past 128 ranks. I keep getting errors like this one:

2025-03-17 15:08:50,853 - INFO - pytato.distributed.verify - find_distributed_partition: Split 928 nodes into 3 parts, with [77, 482, 604] nodes in ea\
ch partition.
Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "/p/lustre5/mtcampbe/CEESD/Experimental/concat-03.13/miniforge3/envs/x.concat/lib/python3.12/site-packages/mpi4py/__main__.py", line 7, in <mod\
ule>
2025-03-17 15:08:50,853 - INFO - pytato.distributed.verify - find_distributed_partition: Split 816 nodes into 3 parts, with [66, 424, 532] nodes in ea\
ch partition.
    main()
  File "/p/lustre5/mtcampbe/CEESD/Experimental/concat-03.13/miniforge3/envs/x.concat/lib/python3.12/site-packages/mpi4py/run.py", line 214, in main
    run_command_line(args)
  File "/p/lustre5/mtcampbe/CEESD/Experimental/concat-03.13/miniforge3/envs/x.concat/lib/python3.12/site-packages/mpi4py/run.py", line 46, in run_comm\
and_line
    run_path(sys.argv[0], run_name='__main__')
  File "<frozen runpy>", line 287, in run_path
  File "<frozen runpy>", line 98, in _run_module_code
  File "<frozen runpy>", line 88, in _run_code
  File "driver.py", line 80, in <module>
    main(actx_class, restart_filename=restart_filename,
  File "/p/lustre5/mtcampbe/CEESD/Experimental/concat-03.13/mirgecom/mirgecom/mpi.py", line 152, in wrapped_func
    func(*args, **kwargs)
  File "/p/lustre5/mtcampbe/CEESD/Experimental/concat-03.13/drivers_y3-prediction/y3prediction/prediction.py", line 4174, in main
2025-03-17 15:08:50,857 - INFO - grudge.array_context - pt.find_distributed_partition: completed (63.69s wall 1.00x CPU)
    compute_smoothed_char_length_compiled(smoothed_char_length_fluid, i)
  File "/p/lustre5/mtcampbe/CEESD/Experimental/concat-03.13/arraycontext/arraycontext/impl/pytato/compile.py", line 350, in __call__
    compiled_func = self._dag_to_compiled_func(
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/p/lustre5/mtcampbe/CEESD/Experimental/concat-03.13/grudge/grudge/array_context.py", line 374, in _dag_to_compiled_func
2025-03-17 15:08:50,859 - INFO - grudge.array_context - pt.find_distributed_partition: completed (61.00s wall 1.00x CPU)
    distributed_partition = pt.find_distributed_partition(
                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/p/lustre5/mtcampbe/CEESD/Experimental/concat-03.13/pytato/pytato/distributed/partition.py", line 998, in find_distributed_partition
    name_to_output_per_part[pid][name] = ary
    ~~~~~~~~~~~~~~~~~~~~~~~^^^^^
IndexError: list index out of range