[clang] Add support for builtin_verbose_trap (PR #79230)

[Akira Hatanaka via cfe-commits]

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+// RUN: %clang_cc1 -triple arm64-apple-ios -std=c++20 -emit-llvm -debug-info-kind=limited %s -o - | FileCheck %s
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ahatanak wrote:

Do we want to add a clang test? I thought we generally don't enable optimization in clang CodeGen tests because it makes the tests fragile. Has the guideline changed?

https://github.com/llvm/llvm-project/pull/79230