Provide daily dumps of the pypi index

[bitplane]

What's the problem this feature will solve?

pip search is broken in the default use-case because the XMLRPC service is down.

Providing a nightly dump would mean it'd be easy to fix - just download the list and search it locally. If it was just a file somewhere then you could redirect to a mirror that has it, I'm sure many organizations with lots of bandwidth would happily mirror it to keep pypi's search working. Plus it'd be a useful file in general.

Describe the solution you'd like
Dump the packages, versions, description and a list of downloads to a file. Dump it somewhere and let it the pip search problem fix itself.

Additional context
A useful alternative to pip search out of the box, pip-search, scrapes the website at the moment. The next time someone makes an abusive bot that hammers that endpoint, then I assume you'll have the search problem all over again.

[di]

Duplicate of #8802.