[clang] [HLSL] Add __is_scalarized_layout_compatible (PR #102227)

[Aaron Ballman via cfe-commits]

================
@@ -6188,6 +6189,23 @@ static bool EvaluateBinaryTypeTrait(Sema &Self, TypeTrait BTT, const TypeSourceI
                TSTToBeDeduced->getTemplateName().getAsTemplateDecl(), RhsT,
                Info) == TemplateDeductionResult::Success;
   }
+  case BTT_IsScalarizedLayoutCompatible: {
+    if (!LhsT->isVoidType() && !LhsT->isIncompleteArrayType())
+      if (Self.RequireCompleteType(Lhs->getTypeLoc().getBeginLoc(), LhsT,
+                                   diag::err_incomplete_type))
+        return true;
----------------
AaronBallman wrote:

```suggestion
    if (!LhsT->isVoidType() && !LhsT->isIncompleteArrayType() &&
        Self.RequireCompleteType(Lhs->getTypeLoc().getBeginLoc(), LhsT,
                                   diag::err_incomplete_type))
      return true;
```

https://github.com/llvm/llvm-project/pull/102227