parallel-full: fix missing files and meta

Previously, this was not usable as a drop-in replacement for `parallel`
since it only included the one exe. This changes to additionally symlink
all files from $out as well as symlink all other outputs. So no files
are missing compared to `parallel`, while being efficiently symlinked.

Further, copy meta and version from the base package.

pkgs/tools/misc/parallel/wrapper.nix

@@ -1,10 +1,18 @@
-{ lib, runCommand, makeWrapper, parallel, perlPackages
+{ lib, symlinkJoin, makeWrapper, parallel, perlPackages
 , extraPerlPackages ? with perlPackages; [ DBI DBDPg DBDSQLite DBDCSV TextCSV ]
 , willCite ? false }:
 
-runCommand "parallel-full" { nativeBuildInputs = [ makeWrapper ]; } ''
-  mkdir -p $out/bin
+symlinkJoin {
+  name = "parallel-full";
+  inherit (parallel) outputs;
+  nativeBuildInputs = [ makeWrapper ];
+  paths = [ parallel ];
+  postBuild = ''
+    ${lib.concatMapStringsSep "\n" (output: "ln -s --no-target-directory ${parallel.${output}} \$${output}") (lib.remove "out" parallel.outputs)}
+
+    rm $out/bin/parallel
     makeWrapper ${parallel}/bin/parallel $out/bin/parallel \
       --set PERL5LIB "${perlPackages.makeFullPerlPath extraPerlPackages}" \
       ${lib.optionalString willCite "--add-flags --will-cite"}
-''
+  '';
+}