lib.types: Make functor.wrapped deprecation work in unprocessed types

Otherwise nested types such as `attrsOf (attrsOf int)` won't have a
backwards compatible `type.nestedTypes.elemType.functor.wrapped`.

Follow-up work to #366015

lib/types.nix

@@ -86,7 +86,7 @@ let
         else
           { elemType = merged; };
     wrappedDeprecationMessage = { loc }: lib.warn ''
-      The deprecated `type.functor.wrapped` attribute of the option `${showOption loc}` is accessed, use `type.nestedTypes.elemType` instead.
+      The deprecated `${lib.optionalString (loc != null) "type."}functor.wrapped` attribute ${lib.optionalString (loc != null) "of the option `${showOption loc}` "}is accessed, use `${lib.optionalString (loc != null) "type."}nestedTypes.elemType` instead.
     '' payload.elemType;
   };
 
@@ -227,7 +227,16 @@ rec {
     { _type = "option-type";
       inherit
         name check merge emptyValue getSubOptions getSubModules substSubModules
-        typeMerge functor deprecationMessage nestedTypes descriptionClass;
+        typeMerge deprecationMessage nestedTypes descriptionClass;
+      functor =
+        if functor ? wrappedDeprecationMessage then
+          functor // {
+            wrapped = functor.wrappedDeprecationMessage {
+              loc = null;
+            };
+          }
+        else
+          functor;
       description = if description == null then name else description;
     };