[clang] [CIR] Represent Cleanups with Cleanup scopes (PR #180276)

[Andy Kaylor via cfe-commits]

================
@@ -45,10 +45,10 @@ void test_cleanup_array() {
 // CIR:   cir.return
 
 // LLVM: define{{.*}} void @_Z18test_cleanup_arrayv()
+// LLVM:   %[[ITER:.*]] = alloca ptr, i64 1
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andykaylor wrote:

```suggestion
// LLVM:   %[[ITER:.*]] = alloca ptr
```

https://github.com/llvm/llvm-project/pull/180276