[clang] [CIR] Emit allocas into the proper lexical scope (PR #132468)

[Bruno Cardoso Lopes via cfe-commits]

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@@ -293,7 +294,8 @@ void CIRGenFunction::startFunction(GlobalDecl gd, QualType returnType,
 
     mlir::Value addrVal =
         emitAlloca(cast<NamedDecl>(paramVar)->getName(),
-                   convertType(paramVar->getType()), paramLoc, alignment);
+                   convertType(paramVar->getType()), paramLoc, alignment,
+                   /*insertIntoFnEntryBlock=*/false);
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bcardosolopes wrote:

I guess here it won't make a difference but for consistency maybe better to leave the default as `true`? Leaving it as false can be confusing as to the intent (even tho in practice won't make a difference). 

https://github.com/llvm/llvm-project/pull/132468