[Test] Reenabled SILOpt/shrink_borrow_scope.

LexicalDestroyFolding allows us to elide the spurious retain/release
that was being tested here.

rdar://87255563

Author: nate-chandler

test/SILOptimizer/shrink_borrow_scope.swift

@@ -1,7 +1,5 @@
 // RUN: %target-swift-frontend -c -O -enable-copy-propagation=true -enable-lexical-lifetimes=true -sil-verify-all -Xllvm -sil-print-final-ossa-module %s | %FileCheck %s
 
-// REQUIRES: rdar87255563
-
 // =============================================================================
 // = DECLARATIONS                                                             {{
 // =============================================================================
@@ -26,9 +24,10 @@ public func eliminate_copy_of_returned_then_consumed_owned_value(arg: __owned An
   // CHECK:       [[ARG_COPY:%[^,]+]] = copy_value [[ARG_LIFETIME]]
   let x = consumeAndProduce(arg)
   // CHECK:       [[X:%[^,]+]] = apply {{%[^,]+}}([[ARG_COPY]])
+  // CHECK:       [[MOVE_X:%[^,]+]] = move_value [lexical] [[X]]
   // no copy of 'x'
   _ = consumeAndProduce(x)
-  // CHECK:       [[RESULT:%[^,]+]] = apply {{%[^,]+}}([[X]])
+  // CHECK:       [[RESULT:%[^,]+]] = apply {{%[^,]+}}([[MOVE_X]])
   // CHECK:       end_borrow [[ARG_LIFETIME]]
   // release result
   // release arg