Add support in `convert.nemo_to_sgrid` for depthw coordinate #2587

Job	Run time
GHA Security Analysis using Zizmor	25s
should run ci	7s
cache-pixi-lock	6s
TypeChecking: pixi run typing	1m 54s
Flaky unit tests: ubuntu \| pixi run -e test tests -m 'flaky'	7m 45s
build-and-upload-nightly-parcels	2m 14s
Unit tests: windows \| pixi run -e test tests	13m 53s
Unit tests: ubuntu \| pixi run -e test-minimum tests	9m 45s
Unit tests: ubuntu \| pixi run -e test-py313 tests	8m 18s
Unit tests: ubuntu \| pixi run -e test tests	8m 57s
Unit tests: ubuntu \| pixi run -e test-py311 tests	8m 2s
Integration: ${{ matrix.os }} \| pixi run -e ${{ matrix.pixi-environment }} tests-notebooks	0s
merge-test-artifacts	0s
	1h 1m 26s

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