Rollup merge of #132106 - maxcabrajac:ident_ref, r=petrochenkov

Pass Ident by reference in ast Visitor

`MutVisitor`'s version of `visit_ident` passes around `&Ident`, but `Visitor` copies `Ident`. This PR changes that

r? `@petrochenkov`

related to #128974

compiler/rustc_lint/src/early.rs

@@ -202,7 +202,7 @@ impl<'a, T: EarlyLintPass> ast_visit::Visitor<'a> for EarlyContextAndPass<'a, T>
         ast_visit::walk_ty(self, t);
     }
 
-    fn visit_ident(&mut self, ident: Ident) {
+    fn visit_ident(&mut self, ident: &Ident) {
         lint_callback!(self, check_ident, ident);
     }