Rollup merge of #132787 - maxcabrajac:fnctxt, r=petrochenkov

Unify FnKind between AST visitors and make WalkItemKind more straight forward

Unifying `FnKind` requires a bunch of changes to `WalkItemKind::walk` signature so I'll change them in one go

related to #128974

r? `@petrochenkov`

compiler/rustc_builtin_macros/src/cfg_eval.rs

@@ -204,10 +204,10 @@ impl MutVisitor for CfgEval<'_> {
     fn flat_map_assoc_item(
         &mut self,
         item: P<ast::AssocItem>,
-        _ctxt: AssocCtxt,
+        ctxt: AssocCtxt,
     ) -> SmallVec<[P<ast::AssocItem>; 1]> {
         let item = configure!(self, item);
-        mut_visit::walk_flat_map_item(self, item)
+        mut_visit::walk_flat_map_assoc_item(self, item, ctxt)
     }
 
     fn flat_map_foreign_item(

compiler/rustc_builtin_macros/src/test_harness.rs

@@ -144,7 +144,15 @@ impl<'a> MutVisitor for TestHarnessGenerator<'a> {
             item.kind
         {
             let prev_tests = mem::take(&mut self.tests);
-            walk_item_kind(&mut item.kind, item.span, item.id, self);
+            walk_item_kind(
+                &mut item.kind,
+                item.span,
+                item.id,
+                &mut item.ident,
+                &mut item.vis,
+                (),
+                self,
+            );
             self.add_test_cases(item.id, span, prev_tests);
         } else {
             // But in those cases, we emit a lint to warn the user of these missing tests.