nixos/treewide: Move rename.nix imports to their respective modules

A centralized list for these renames is not good because:
- It breaks disabledModules for modules that have a rename defined
- Adding/removing renames for a module means having to find them in the
central file
- Merge conflicts due to multiple people editing the central file

nixos/modules/system/boot/systemd.nix

@@ -408,7 +408,6 @@ let
 in
 
 {
-
   ###### interface
 
   options = {
@@ -1006,5 +1005,7 @@ in
     [ (mkRenamedOptionModule [ "boot" "systemd" "sockets" ] [ "systemd" "sockets" ])
       (mkRenamedOptionModule [ "boot" "systemd" "targets" ] [ "systemd" "targets" ])
       (mkRenamedOptionModule [ "boot" "systemd" "services" ] [ "systemd" "services" ])
+      (mkRenamedOptionModule [ "jobs" ] [ "systemd" "services" ])
+      (mkRemovedOptionModule [ "systemd" "generator-packages" ] "Use systemd.packages instead.")
     ];
 }