Replace dummy_exchange_with_bound_dim with noop derived from SingleNodeExchange

[Copilot]

dummy_exchange_with_bound_dim was a standalone noop function duplicating behavior already provided by SingleNodeExchange.exchange. Replace it with a functools.partial of the real exchange object.

• exchange_utils.py: Replace function definition with:

  noop_exchange = functools.partial(single_node_default.exchange, dims.CellDim)

  SingleNodeExchange.exchange is inherently a noop (returns SingleNodeResult whose finish() is a pass), so the bound dimension is irrelevant.

• 9 test files: Rename exchange_utils.dummy_exchange_with_bound_dim → exchange_utils.noop_exchange

Warning

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I tried to connect to the following addresses, but was blocked by firewall rules:

• gridtools.github.io
  • Triggering command: /usr/bin/python3 /usr/bin/python3 /usr/lib/python3/dist-packages/pip/__pip-REDACTED__.py install --ignore-installed --no-user --prefix /tmp/pip-build-env-xe77e54j/overlay --no-warn-script-location --no-binary :none: --only-binary :none: -i REDACTED --find-links REDACTED -- setuptools>=61.0 wheel>=0.40.0 grep (dns block)
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  • Triggering command: /usr/bin/pip pip install --find-links REDACTED -e model/common -e model/testing --quiet sphere/dycore/st-rs k/_temp/ghcca-no--destination-port grep -l ge 4py/tools/py2fgen/wrappers/grid_wrapper.py /home/REDACTED/work/_temp/ghcca-node/node/bin/grep ge sphere/dycore/st-a grep grep (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

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[jenkins-apn]

Hi there, this is jenkins continuous integration...
Do you want me to verify this patch?

[jenkins-apn]

Hi there, this is jenkins continuous integration...
Do you want me to verify this patch?

[havogt]

This change doesn't make sense...

[havogt]

But probably because I already did the deduplication in a previous PR and it didn't understand that there is nothing to do... Now it's more or less a rename but not for the better.