test that the size of data in channel dimension matches with metadata

[mattersoflight]

HCSZarr dataset class should test that the size of each dimension matches in data and in metadata. I was able to write a wrong zarr dataset that would not open with napari-ome-zarr.

with HCSZarr.open(
    "hcs_wrong.zarr", mode="a", channel_names=["DAPI", "GFP"]
) as dataset:
    for row, col, fov in position_list:
        position = dataset.create_position(row, col, fov)
        position[0] = np.random.randint(
            0, np.iinfo(np.uint16).max, size=(5, 3, 3, 32, 32), dtype=np.uint16
        )

Originally posted by @mattersoflight in #31 (comment)