[clang] [clang-tools-extra] [clang][NFC] Refactor `CXXNewExpr::InitializationStyle` (PR #71322)

[Aaron Ballman via cfe-commits]

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@@ -2008,22 +2008,23 @@ ExprResult Sema::BuildCXXNew(SourceRange Range, bool UseGlobal,
   SourceRange TypeRange = AllocTypeInfo->getTypeLoc().getSourceRange();
   SourceLocation StartLoc = Range.getBegin();
 
-  CXXNewExpr::InitializationStyle initStyle;
+  CXXNewInitializationStyle initStyle;
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AaronBallman wrote:

```suggestion
  CXXNewInitializationStyle InitStyle;
```
since we're already touching all those lines anyway? (I don't insist.)

https://github.com/llvm/llvm-project/pull/71322