python: update readline to 8.1

[tjni]

The Python interpreter crashes on Darwin when the terminal is resized when it's built using readline 6.3.

It's enough to update to readline 7.0 (in fact, readline 7.0-alpha), but it doesn't seem easy to bisect further as the public GNU readline repository does not contain individual commits.

This can be replaced by #151090, or it can be committed first. It addresses #151090 (comment) and fixes #203376.

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandbox = true set in nix.conf? (See Nix manual)
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 22.11 Release Notes (or backporting 22.05 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
  • (Release notes changes) Ran nixos/doc/manual/md-to-db.sh to update generated release notes
• Fits CONTRIBUTING.md.

[tjni]

@ofborg build python27, python37, python38, python39, python310, python311

[tjni]

@ofborg build python27, python37, python38, python39, python310, python311

[SuperSandro2000]

I merged the linked PR. Lets see how that goes.

[tjni]

Thank you! I'll close this for now to reduce chance of confusion.