Better error handling for downloads

[russss]

Pull Request Template

Description

This adds better handling for data file downloads, and raises an error if an HTML response is detected rather than producing zero-size h5 files.

With my Earthdata account I had to visit one of the data file URLs and grant permissions before I could download the data. This change now makes this much more obvious, as it outputs the failing URL which you can visit in a browser and see what the issue is.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

Screenshots (if appropriate)

Additional context