Support for Fields in multiple files without a `time` dimension #483

Job	Run time
py3.13 \| macos \| integration tests	15m 32s
py3.13 \| macos \| integration tests	15m 23s
mypy	4m 3s
mypy	3m 55s
py3.13 \| ubuntu \| integration tests	18m 6s
py3.13 \| ubuntu \| integration tests	18m 15s
py3.13 \| macos \| unit tests	4m 27s
py3.13 \| macos \| unit tests	5m 44s
py3.13 \| windows \| integration tests	29m 51s
py3.13 \| windows \| integration tests	29m 31s
py3.13 \| ubuntu \| unit tests	5m 26s
py3.13 \| ubuntu \| unit tests	5m 38s
py3.10 \| ubuntu \| integration tests	17m 32s
py3.10 \| ubuntu \| integration tests	18m 28s
py3.13 \| windows \| unit tests	11m 51s
py3.13 \| windows \| unit tests	9m 36s
py3.10 \| ubuntu \| unit tests	5m 32s
py3.10 \| ubuntu \| unit tests	5m 27s
py3.11 \| ubuntu \| unit tests	5m 10s
py3.11 \| ubuntu \| unit tests	5m 22s
py3.12 \| ubuntu \| unit tests	5m 40s
py3.12 \| ubuntu \| unit tests	5m 32s
merge-test-artifacts	0s
merge-test-artifacts	0s
	4h 6m 1s

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