parallel{,-full}: move to `by-name`, modernize a bit (#446868)

pkgs/tools/misc/parallel/default.nix pkgs/by-name/pa/parallel/package.nix

···
   buildPackages,
 }:
 
-stdenv.mkDerivation rec {
+stdenv.mkDerivation (finalAttrs: {
   pname = "parallel";
   version = "20250822";
 
   src = fetchurl {
-    url = "mirror://gnu/parallel/parallel-${version}.tar.bz2";
+    url = "mirror://gnu/parallel/parallel-${finalAttrs.version}.tar.bz2";
     hash = "sha256-AZ0yhyKGfP/pGMRJNkMIwN8EhFbGkpm5FFGj5vrJFno=";
   };
 
···
 
   doCheck = true;
 
-  meta = with lib; {
+  meta = {
     description = "Shell tool for executing jobs in parallel";
     longDescription = ''
       GNU Parallel is a shell tool for executing jobs in parallel.  A job
···
       programs.
     '';
     homepage = "https://www.gnu.org/software/parallel/";
-    license = licenses.gpl3Plus;
-    platforms = platforms.all;
-    maintainers = with maintainers; [
+    license = lib.licenses.gpl3Plus;
+    platforms = lib.platforms.all;
+    maintainers = with lib.maintainers; [
       pSub
       tomberek
     ];
     mainProgram = "parallel";
   };
-}
+})

pkgs/top-level/all-packages.nix

···
 
   paperwork = callPackage ../applications/office/paperwork/paperwork-gtk.nix { };
 
-  parallel = callPackage ../tools/misc/parallel { };
-
-  parallel-full = callPackage ../tools/misc/parallel/wrapper.nix { };
-
   parcellite = callPackage ../tools/misc/parcellite { };
 
   patchutils = callPackage ../tools/text/patchutils { };