Auto merge of #134625 - compiler-errors:unsafe-binders-ty, r=oli-obk

Begin to implement type system layer of unsafe binders

Mostly TODOs, but there's a lot of match arms that are basically just noops so I wanted to split these out before I put up the MIR lowering/projection part of this logic.

r? oli-obk

Tracking:

- https://github.com/rust-lang/rust/issues/130516

compiler/rustc_mir_dataflow/src/move_paths/builder.rs

@@ -161,6 +161,7 @@ impl<'a, 'tcx, F: Fn(Ty<'tcx>) -> bool> MoveDataBuilder<'a, 'tcx, F> {
                     | ty::CoroutineWitness(..)
                     | ty::Never
                     | ty::Tuple(_)
+                    | ty::UnsafeBinder(_)
                     | ty::Alias(_, _)
                     | ty::Param(_)
                     | ty::Bound(_, _)
@@ -200,6 +201,7 @@ impl<'a, 'tcx, F: Fn(Ty<'tcx>) -> bool> MoveDataBuilder<'a, 'tcx, F> {
                     | ty::Dynamic(_, _, _)
                     | ty::CoroutineWitness(..)
                     | ty::Never
+                    | ty::UnsafeBinder(_)
                     | ty::Alias(_, _)
                     | ty::Param(_)
                     | ty::Bound(_, _)