Add `tmp_zarr` fixture #349

Job	Run time
mypy	3m 45s
py3.12 \| macos \| integration tests	12m 54s
py3.12 \| macos \| unit tests	11m 36s
py3.12 \| ubuntu \| integration tests	18m 13s
py3.12 \| ubuntu \| unit tests	13m 45s
py3.12 \| windows \| integration tests	32m 28s
py3.12 \| windows \| unit tests	21m 24s
py3.10 \| ubuntu \| integration tests	18m 13s
py3.10 \| ubuntu \| unit tests	12m 51s
py3.11 \| ubuntu \| unit tests	12m 18s
merge-test-artifacts	2s
	2h 37m 29s

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