[clang] [Clang][ExprConstant] fix constant expression did not evaluate to integer (PR #97146)

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Sirraide wrote:

Ah, that was in the original stack trace, I see. The fix here makes sense to me because it’s in `FastEvaluateAsRValue`, so it makes sense that that can fail since it’s just supposed to be a fast path.

https://github.com/llvm/llvm-project/pull/97146