[clang] [CIR] Fix record layout for [[no_unique_address]] fields (PR #186701)

[Henrich Lauko via cfe-commits]

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@@ -572,9 +572,15 @@ void CIRRecordLowering::accumulateFields() {
       assert((field == fieldEnd || !field->isBitField()) &&
              "Failed to accumulate all the bitfields");
     } else if (!field->isZeroSize(astContext)) {
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xlauko wrote:

That condition was there originally written by you, replacing it by `isEmptyFieldForLayout` breaks some tests, I will investigate further.

https://github.com/llvm/llvm-project/pull/186701