Test cartesian coords

[jcanton]

Add cartesian coordinates to serialized data (sync with https://github.com/C2SM/icon-exclaim/pull/406 AND UPDATE CI DATA)
this allows for testing of the math/helpers.py::geographical_to_cartesian_on_xyz functions
it will also allow for MPI tests on torus #692 which need serialized decomposed grid cartesian coordinates

[msimberg]

Thanks @jcanton!

I'm a bit confused how this passes in CI, but is it because the github workflows don't run datatests? At least I couldn't find any quickly. I suppose you didn't re-serialize all the experiments, and if that's the case I would expect the test_geometry.py tests to fail for spherical grids (which is ok, as discussed; in that case we make the comparison to serialized data conditional on the geometry type in the tests).

[jcanton]

I didn't trigger the CI (cscs/default) which would not yet pass no. I'm waiting for @OngChia to decide together what to do with the Weisman Klemp experiment so I update everything only once

[github-actions]

Mandatory Tests

Please make sure you run these tests via comment before you merge!

• cscs-ci run default

Optional Tests

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• cscs-ci run benchmark-bencher

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• cscs-ci run dace

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• cscs-ci run extra

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