Only show "Downloaded satellite imagery" success message if there were no errors during download

[ejm714]

From #137

I overlooked the satellite download initially because although it indicated that errors were raised in downloading it concluded with the message "2024-10-17 14:49:41.888 | SUCCESS | cyfi.pipeline:_prepare_features:117 - Downloaded satellite imagery"

Debugging satellite download traceback:
PS C:\Users#########> cyfi predict-point --lat 41.2 --lon -73.2 --date 2023-09-14
2024-10-17 14:49:29.690 | SUCCESS | cyfi.pipeline:_prep_predict_data:288 - Loaded 1 sample points (unique combinations of date, latitude, and longitude) for prediction
2024-10-17 14:49:34.917 | PROGRESS | cyfi.data.satellite_data:download_satellite_data:438 - Downloading satellite imagery for 7 Sentinel-2 items.
0%| | 0/7 [00:00<?, ?it/s]2024-10-17 14:49:40.561 | DEBUG | cyfi.data.satellite_data:download_row:414 - rasterio.errors.RasterioIOError raised for sample ID c0847b54bba6a81b25c3b12ea8bee5e3, Sentinel-2 item ID S2B_MSIL2A_20230914T153909_R011_T18TXL_20230915T012705
2024-10-17 14:49:40.600 | DEBUG | cyfi.data.satellite_data:download_row:414 - rasterio.errors.RasterioIOError raised for sample ID c0847b54bba6a81b25c3b12ea8bee5e3, Sentinel-2 item ID S2A_MSIL2A_20230909T153821_R011_T18TXL_20230910T002731
2024-10-17 14:49:40.609 | DEBUG | cyfi.data.satellite_data:download_row:414 - rasterio.errors.RasterioIOError raised for sample ID c0847b54bba6a81b25c3b12ea8bee5e3, Sentinel-2 item ID S2B_MSIL2A_20230815T153819_R011_T18TXL_20230815T233300
2024-10-17 14:49:40.734 | DEBUG | cyfi.data.satellite_data:download_row:414 - rasterio.errors.RasterioIOError raised for sample ID c0847b54bba6a81b25c3b12ea8bee5e3, Sentinel-2 item ID S2B_MSIL2A_20230825T153819_R011_T18TXL_20230825T221503
2024-10-17 14:49:40.734 | DEBUG | cyfi.data.satellite_data:download_row:414 - rasterio.errors.RasterioIOError raised for sample ID c0847b54bba6a81b25c3b12ea8bee5e3, Sentinel-2 item ID S2A_MSIL2A_20230830T153821_R011_T18TXL_20230831T022152
2024-10-17 14:49:40.741 | DEBUG | cyfi.data.satellite_data:download_row:414 - rasterio.errors.RasterioIOError raised for sample ID c0847b54bba6a81b25c3b12ea8bee5e3, Sentinel-2 item ID S2B_MSIL2A_20230904T153819_R011_T18TXL_20230904T223211
2024-10-17 14:49:41.509 | DEBUG | cyfi.data.satellite_data:download_row:414 - rasterio.errors.RasterioIOError raised for sample ID c0847b54bba6a81b25c3b12ea8bee5e3, Sentinel-2 item ID S2A_MSIL2A_20230820T153821_R011_T18TXL_20230821T000845
100%|███████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████| 7/7 [00:06<00:00, 1.08it/s]
2024-10-17 14:49:41.888 | SUCCESS | cyfi.pipeline:_prepare_features:117 - Downloaded satellite imagery

Relevant part of the codebase: https://github.com/drivendataorg/cyfi/blob/85c82cadc1f26286c3ab6c2238d682b1233da1a2/cyfi/pipeline.py#L115-L118