[clang] [CIR] Upstream handling of integral-to-pointer casts (PR #161653)

[Amr Hesham via cfe-commits]

================
@@ -81,6 +86,19 @@ class CIRDataLayout {
   }
 
   llvm::TypeSize getTypeSizeInBits(mlir::Type ty) const;
+
+  llvm::TypeSize getPointerTypeSizeInBits(mlir::Type Ty) const {
----------------
AmrDeveloper wrote:

```suggestion
  llvm::TypeSize getPointerTypeSizeInBits(mlir::Type ty) const {
```

https://github.com/llvm/llvm-project/pull/161653