python310Packages.pygobject: don't propagate cairo dev dependencies

[SuperSandro2000]

After this change applications like emote no longer depend on -dev outputs.

Tested by using nix-tree and comparing the runtime dependencies.

Description of changes

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/)
• 23.11 Release Notes (or backporting 23.05 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.

[Artturin]

This

diff --git a/pkgs/applications/version-management/meld/default.nix b/pkgs/applications/version-management/meld/default.nix
index 224efe8c1ac2..5c7ca1336baf 100644
--- a/pkgs/applications/version-management/meld/default.nix
+++ b/pkgs/applications/version-management/meld/default.nix
@@ -48,8 +48,8 @@ python3.pkgs.buildPythonApplication rec {
   ];

   propagatedBuildInputs = with python3.pkgs; [
-    pygobject3
-    pycairo
+    pygobject3.out
+    pycairo.out
   ];

   postPatch = ''

would be better

It was definitely a big mistake to use propagatedBuildInputs for python deps because it chooses the dev output #102613

[SuperSandro2000]

How do we want to solve this?