[compiler-rt] [Darwin][Sanitizers][CrashReporter] Adopt initializer for Crash Reporter Annotations struct (PR #123978)

[via llvm-commits]

thetruestblue wrote:

I don't understand the clang-format failure -- I think it's because the corresponding `#if` is not within the diff. I am going to ignore it. 

https://github.com/llvm/llvm-project/pull/123978