[clang] [CIR][CUDA] Handle local, __device__, __shared__, and __constant__ variables (PR #184248)

[Zaky Hermawan via cfe-commits]

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@@ -797,6 +797,22 @@ CIRGenModule::getOrCreateCIRGlobal(StringRef mangledName, mlir::Type ty,
                "external const declaration with initializer");
   }
 
+  // TODO(cir): if this method is used to handle functions we must have
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ZakyHermawan wrote:

This is just stuff from [incubator](https://github.com/llvm/clangir/blob/main/clang/lib/CIR/CodeGen/CIRGenModule.cpp#L1289).
I will remove it, because getOrCreateCIRGlobal is specifically for global variables.

https://github.com/llvm/llvm-project/pull/184248