[clang] Respect the [[clang::unsafe_buffer_usage]] attribute for field and constructor initializers (PR #91991)

[Artem Dergachev via cfe-commits]

haoNoQ wrote:

No worries! I've just seen folks independently rediscover some of your work so I wanted them to see if they want to deduplicate the efforts.

https://github.com/llvm/llvm-project/pull/91991