google-cloud-sdk: move to pkgs/by-name

pkgs/tools/admin/google-cloud-sdk/default.nix pkgs/by-name/go/google-cloud-sdk/package.nix

···
   lib,
   fetchurl,
   makeWrapper,
-  python3,
+  python312,
   openssl,
   jq,
   callPackage,
···
 }:
 
 let
+  python3 = python312;
   # include a compatible pyopenssl version: https://github.com/NixOS/nixpkgs/issues/379291
   # remove ASAP: https://github.com/googleapis/google-api-python-client/issues/2554
   pythonCustom = python3.override {

pkgs/top-level/all-packages.nix

···
     isStereo = true;
   };
 
-  google-cloud-sdk = callPackage ../tools/admin/google-cloud-sdk {
-    python3 = python312;
-  };
   google-cloud-sdk-gce = google-cloud-sdk.override {
-    python3 = python312;
     with-gce = true;
   };