rename bound region instantiation

- `erase_late_bound_regions` -> `instantiate_bound_regions_with_erased`
- `replace_late_bound_regions_X` -> `instantiate_bound_regions_X`

compiler/rustc_trait_selection/src/traits/select/candidate_assembly.rs

@@ -1051,7 +1051,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
     ) {
         // The regions of a type don't affect the size of the type
         let tcx = self.tcx();
-        let self_ty = tcx.erase_late_bound_regions(obligation.predicate.self_ty());
+        let self_ty = tcx.instantiate_bound_regions_with_erased(obligation.predicate.self_ty());
         // We should erase regions from both the param-env and type, since both
         // may have infer regions. Specifically, after canonicalizing and instantiating,
         // early bound regions turn into region vars in both the new and old solver.

compiler/rustc_trait_selection/src/traits/select/confirmation.rs

@@ -327,8 +327,9 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
         // care about other regions. Erasing late-bound regions is equivalent
         // to instantiating the binder with placeholders then erasing those
         // placeholder regions.
-        let predicate =
-            self.tcx().erase_regions(self.tcx().erase_late_bound_regions(obligation.predicate));
+        let predicate = self
+            .tcx()
+            .erase_regions(self.tcx().instantiate_bound_regions_with_erased(obligation.predicate));
 
         let Some(assume) = rustc_transmute::Assume::from_const(
             self.infcx.tcx,