mkPythonPackage, mkPythonApplication: handle passthru with stdenv.mkDerivation instead of lib.extendDerivation

[ShamrockLee]

The passthru specification of buildPythonPackage and buildPythonApplication was initially implemented via lib.extendDerivation instead of passing to stdenv.mkDerivation. In b9138b7 (as part of #271597), passthru is also passed down to mkDerivation, but the effect of lib.extendDerivation still shadows the passthru attributes from the result derivation returned by mkDerivation.

This PR simplifies the implementation and only passes passthru to mkDerivation but not to lib.extendDerivation. This change keeps the evaluation result unchanged but simplifies the code a bit.

Things done

• Built on platform(s)
  • x86_64-linux (no rebuild)
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandboxing enabled in nix.conf? (See Nix manual)
  • sandbox = relaxed
  • sandbox = true
• 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/)
• 24.11 Release Notes (or backporting 23.11 and 24.05 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
• Fits CONTRIBUTING.md.

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[nixos-discourse]

This pull request has been mentioned on NixOS Discourse. There might be relevant details there:

https://discourse.nixos.org/t/prs-ready-for-review/3032/4655

[ShamrockLee]

Result of nixpkgs-review pr 347130 run on x86_64-linux 1

[natsukium]

The issue was helpful in understanding why we should avoid using extendDerivation. Thanks for addressing this.