Generate download_info.info.hashes in install report for direct URL archives

[sbidoul]

fixes #11948

In a followup I'll further clean up legacy uses of the direct URL hash key.

[sbidoul]

This one is ready to go in 23.1 and fairly straightforward. I'll merge tomorrow if there no comments before.

[uranusjr]

No objections to the patch. This reminds me though, is there a writeup on the hash and hashes compatibility pair? Last time I wanted to work on this part of the code base, trying to figure out how the two attributes interact cost me a ton of time. Some docstrings or comments would help greatly.

[sbidoul]

No objections to the patch. This reminds me though, is there a writeup on the hash and hashes compatibility pair? Last time I wanted to work on this part of the code base, trying to figure out how the two attributes interact cost me a ton of time. Some docstrings or comments would help greatly.

@uranusjr We are a bit in an in-between situation with hash and hashes indeed. I have follow-ups in the work in this area that should clarify this.

Thanks for the review again :)