[clang] [clang]: support std::meta::info for primitive types (PR #190356)

[via cfe-commits]

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@@ -314,13 +316,16 @@ class APValue {
     const AddrLabelExpr* LHSExpr;
     const AddrLabelExpr* RHSExpr;
   };
+  struct ReflectionData {
+    const ReflectionKind OperandKind;
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Sirraide wrote:

```suggestion
    ReflectionKind OperandKind;
```
APValues are move-assignable/copy-assignable so I don’t think having `const` members is a good idea

https://github.com/llvm/llvm-project/pull/190356