astropy v8.0.dev now includes "overhaul cache and config dir discovery"

[Pey Lian Lim]

https://github.com/astropy/astropy/pull/19575 is now merged. If you use or extend astropy caching and config mechanism, please do check against the latest astropy dev wheel, and provide feedback. The changes might not be backward compatible with your existing cache/config locations or workflow.

For a start, I would recommend you find out where your current cache and config for astropy (or package extending these astropy features) go, and then see where they go after you install the latest dev astropy.

Thank you for your cooperation and patience.

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Originally posted within https://groups.google.com/g/astropy-dev/c/X69d3w0TqPo/m/rYsQoV1uAAAJ by Clément Robert:

I'd really like that https://github.com/astropy/astropy/pull/19575 gets a shot for astropy 8.0, because it looks increasingly clear to me that it won't be possible to solve all known bugs/quirks with the dir discovery system without also changing the behavior of existing APIs. It's a major effort but I'm nearing convergence and I think it'd be a shame to delay it by a year or longer.

Of course the issue is that:

- the PR is already pretty big (and might get slightly bigger still)

- the only other maintainer who's already expert enough to review this relatively quickly would be Pey Lian

- she won't be available until the end of the month

this will leave very little time to get a proper review from her. There are a couple solutions though:

1) someone else steps up to review this beast

2) we postpone the feature freeze by a week or two

I'm sorry I couldn't get this project going earlier as I initially planned.

Clément