st: move nixpkgs.config options inside the recipe

pkgs/applications/terminal-emulators/st/default.nix

···
   libXft,
   ncurses,
   writeText,
-  conf ? null,
-  patches ? [ ],
-  extraLibs ? [ ],
+  config,
+  conf ? config.st.conf or null,
+  patches ? config.st.patches or [ ],
+  extraLibs ? config.st.extraLibs or [ ],
   nixosTests,
   # update script dependencies
   gitUpdater,

pkgs/top-level/all-packages.nix

···
     emojiSupport = true;
   };
 
-  st = callPackage ../applications/terminal-emulators/st {
-    conf = config.st.conf or null;
-    patches = config.st.patches or [ ];
-    extraLibs = config.st.extraLibs or [ ];
-  };
+  st = callPackage ../applications/terminal-emulators/st { };
   xst = callPackage ../applications/terminal-emulators/st/xst.nix { };
   mcaimi-st = callPackage ../applications/terminal-emulators/st/mcaimi-st.nix { };