treewide: concatStrings (intersperse ...) -> concatStringsSep ...

Update all usage of lib.concatStrings (lib.intersperse ...) to
lib.concatStringsSep. This produces the same result as per https://github.com/NixOS/nixpkgs/pull/135843,
however it yields a performance benefit on Nix versions that
support the builtins.concatStringsSep primop.

pkgs/applications/misc/keepass/default.nix

···
   # after loading. It is brought into plugins bin/ directory using
   # buildEnv in the plugin derivation. Wrapper below makes sure it
   # is found and does not pollute output path.
-  binPaths = lib.concatStrings (lib.intersperse ":" (map (x: x + "/bin") plugins));
+  binPaths = lib.concatStringsSep ":" (map (x: x + "/bin") plugins);
 
   dynlibPath = lib.makeLibraryPath [ gtk2 ];
 

pkgs/applications/video/vdr/wrapper.nix

···
     inherit license homepage;
     description = description
     + " (with plugins: "
-    + lib.concatStrings (lib.intersperse ", " (map (x: ""+x.name) plugins))
+    + lib.concatStringsSep ", " (map (x: ""+x.name) plugins)
     + ")";
   };
 }

pkgs/desktops/xfce/core/thunar/wrapper.nix

···
 
     description = thunar.meta.description + optionalString
       (0 != length thunarPlugins)
-      " (with plugins: ${concatStrings (intersperse ", " (map (x: x.name) thunarPlugins))})";
+      " (with plugins: ${concatStringsSep  ", " (map (x: x.name) thunarPlugins)})";
   };
 }

pkgs/development/compilers/gcc/common/configure-flags.nix

···
       "--with-system-zlib"
       "--enable-static"
       "--enable-languages=${
-        lib.concatStrings (lib.intersperse ","
+        lib.concatStringsSep ","
           (  lib.optional langC        "c"
           ++ lib.optional langCC       "c++"
           ++ lib.optional langD        "d"
···
           ++ lib.optionals crossDarwin [ "objc" "obj-c++" ]
           ++ lib.optional langJit      "jit"
           )
-        )
       }"
     ]
 

pkgs/misc/emulators/retroarch/wrapper.nix

···
     inherit license homepage platforms maintainers;
     description = description
                   + " (with cores: "
-                  + lib.concatStrings (lib.intersperse ", " (map (x: ""+x.name) cores))
+                  + lib.concatStringsSep ", " (map (x: ""+x.name) cores)
                   + ")";
   };
 }

pkgs/tools/graphics/diagrams-builder/default.nix

···
   nativeBuildInputs = [ makeWrapper ];
 
   buildCommand = with lib;
-    concatStrings (intersperse "\n" (map exeWrapper backends));
+    concatStringsSep "\n" (map exeWrapper backends);
 
   # Will be faster to build the wrapper locally then to fetch it from a binary cache.
   preferLocalBuild = true;