gnomeExtensions: normalize pnames

[jtojnar]

Motivation for this change

They should have gnome-shell-extension prefix like most other extension packages.
This is what other distros listed on Repology use so Repology will be able to unify them.

Exception is chrome-gnome-shell, which is estabilished under that name.

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS linux)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Added a release notes entry if the change is major or breaking
• Fits CONTRIBUTING.md.

[piegamesde]

Thanks. While you're at it, can you please make sure the manually packaged extensions have the "correct" name (i.e. the same as the automatically packaged ones)? #122921 (comment)

Also, do we need to add aliases for backwards compatibility?

[jtojnar]

Yeah, aliases will be needed. Cannot do that now.

[piegamesde]

Having a look at this again. You changed the pnames, but not the attributes. Doesn't this mean that no aliases are needed at all for compatibility?

[jtojnar]

Yeah, I did not mean to change the attributes (corrected that in 571d540). I thought you were talking about the attributes that do not match the slugs, which I did not want to address here.