Accept TyCtxt instead of TyCtxtAt in Ty::is_* functions

Functions in answer:

- `Ty::is_freeze`
- `Ty::is_sized`
- `Ty::is_unpin`
- `Ty::is_copy_modulo_regions`

compiler/rustc_ty_utils/src/needs_drop.rs

@@ -109,7 +109,7 @@ where
 
             for component in components {
                 match *component.kind() {
-                    _ if component.is_copy_modulo_regions(tcx.at(DUMMY_SP), self.param_env) => (),
+                    _ if component.is_copy_modulo_regions(tcx, self.param_env) => (),
 
                     ty::Closure(_, substs) => {
                         queue_type(self, substs.as_closure().tupled_upvars_ty());