Rollup merge of #90521 - jhpratt:stabilize-destructuring_assignment, r=jackh726,pnkfelix

Stabilize `destructuring_assignment`

Closes #71126

- [Stabilization report](https://github.com/rust-lang/rust/issues/71126#issuecomment-941148058)
- [Completed FCP](https://github.com/rust-lang/rust/issues/71126#issuecomment-954914819)

`@rustbot` label +F-destructuring-assignment +T-lang
Also needs +relnotes but I don't have permission to add that tag.

compiler/rustc_typeck/src/check/expr.rs

@@ -878,11 +878,6 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                         "let ".to_string(),
                         Applicability::MachineApplicable,
                     );
-                    if !self.sess().features_untracked().destructuring_assignment {
-                        // We already emit an E0658 with a suggestion for `while let`, this is
-                        // redundant output.
-                        err.delay_as_bug();
-                    }
                     break;
                 }
                 hir::Node::Item(_)