Fix Zarr Sink `addTile` when no samples axis is specified #2755

Job	Run time
build-and-publish-base	3m 47s
build-and-publish-targets (geo)	3m 4s
build-and-publish-targets (jupyter)	4m 17s
build-and-publish-targets (jupyter-geo)	2m 51s
	13m 59s

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