resholve: fix tests after #232713

One of resholve's passthru tests depended on getting `script` from
util-linux, but it's no longer there on macos after #232713.

This change just tracks upstream change to use unixtools.script, which
is what I should have used in the first place. Upstream commit for
reference:

https://github.com/abathur/resholve/commit/340715094963885b58785176c0d444f3b511a9e5

pkgs/development/misc/resholve/test.nix

@@ -20,7 +20,7 @@
 , runDemo ? false
 , binlore
 , sqlite
-, util-linux
+, unixtools
 , gawk
 , rlwrap
 , gnutar
@@ -29,7 +29,7 @@
 
 let
   default_packages = [ bash file findutils gettext ];
-  parsed_packages = [ coreutils sqlite util-linux gnused gawk findutils rlwrap gnutar bc ];
+  parsed_packages = [ coreutils sqlite unixtools.script gnused gawk findutils rlwrap gnutar bc ];
 in
 rec {
   module1 = resholve.mkDerivation {