Harden materialize to unexpected files

[robmarkcole]

I had opened a geotif in QGIS, later my materialize failed with

Traceback (most recent call last):
  File "/Users/robin.cole/gitlab/eda-rslearn-soil-moisture-dataset/venv/bin/rslearn", line 8, in <module>
    sys.exit(main())
             ^^^^^^
  File "/Users/robin.cole/gitlab/eda-rslearn-soil-moisture-dataset/rslearn/rslearn/main.py", line 887, in main
    handler()
  File "/Users/robin.cole/gitlab/eda-rslearn-soil-moisture-dataset/rslearn/rslearn/main.py", line 749, in dataset_materialize
    apply_on_windows_args(fn, args)
  File "/Users/robin.cole/gitlab/eda-rslearn-soil-moisture-dataset/rslearn/rslearn/main.py", line 372, in apply_on_windows_args
    apply_on_windows(
  File "/Users/robin.cole/gitlab/eda-rslearn-soil-moisture-dataset/rslearn/rslearn/main.py", line 364, in apply_on_windows
    for _ in tqdm.tqdm(outputs, total=num_batches):
  File "/Users/robin.cole/gitlab/eda-rslearn-soil-moisture-dataset/venv/lib/python3.11/site-packages/tqdm/std.py", line 1181, in __iter__
    for obj in iterable:
  File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/multiprocessing/pool.py", line 873, in next
    raise value
rasterio.errors.RasterioIOError: 'dataset/tiles/era5/era5land_monthlyaveraged_2023_11/total-precipitation/geotiff.tif.aux.xml' not recognized as being in a supported file format.