gh-130120: Prevent str(zipfile.Path) from raising exception on io.BytesIO-input

[yngvem]

Here are some small updates to zipfile.Path to prevent them from raising exceptions when Path-objects that are based on in-memory zipfiles are printed.

I set the printed filename to :memory: to mirror the behaviour of in-memory sqlite3 databases. However, it may also make sense to set the name to \0 (or include \0 in the name) to make it abundantly clear that this is no file.

• Issue: zipfile.Path has only partial compatibility io.BytesIO #130120

[jaraco]

As you've noted, there are some design decisions to make. I'm going to take those back to the issue to discuss.

[bedevere-app]

A Python core developer has requested some changes be made to your pull request before we can consider merging it. If you could please address their requests along with any other requests in other reviews from core developers that would be appreciated.

Once you have made the requested changes, please leave a comment on this pull request containing the phrase I have made the requested changes; please review again. I will then notify any core developers who have left a review that you're ready for them to take another look at this pull request.

[jaraco]

Given the history I've recently been reminded of in #100609, I'm going to close this PR. Hang onto the branch, though, in case we decide to go with something like you've drafted. Thanks for understanding.