[llvm] [NFC] [hwasan] also be more consistent when getting pointer types (PR #84399)

[Vitaly Buka via llvm-commits]

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@@ -612,8 +610,6 @@ void HWAddressSanitizer::initializeModule() {
 
   C = &(M.getContext());
   IRBuilder<> IRB(*C);
-  IntptrTy = IRB.getIntPtrTy(DL);
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vitalybuka wrote:

Do we need getPtrTy with opaque ptrs?

https://github.com/llvm/llvm-project/pull/84399