remote-image: support ome.tif image format

Need to do something about this:
https://github.com/InsightSoftwareConsortium/itk-viewer/blob/9a6066770c74dae1f68bbc70da03671c7d477eae/packages/remote-image/itk_viewer_remote_image/remote_zarr.py#L62-L68

That code errors when trying to load an `ome.tif` file. Need to fix that.

Then later optimization possiblities:

Right now, the remote-renderer package does not actualy request chunks from the returned Zarr store. remote-renderer really wants the image metadata (spacing, array size, etc.) to puppatear `agave-renderer`. Would be sweet if this chunk of code simply generated NGFF-Zarr metadata for the single image scale raw input, without calling `to_multiscales`, whose output will never be used.

Or we take bull by horns and feed the NGFF-Zarr output of `remote-image::remote_zarr.py` to `agave-renderer` service.