[clang] [Wunsafe-buffer-usage] Turn off unsafe-buffer warning for methods annotated with clang::unsafe_buffer_usage attribute (PR #125671)

[David Tarditi via cfe-commits]

https://github.com/dtarditi approved this pull request.

Looks good - thank you for adding the tests.


https://github.com/llvm/llvm-project/pull/125671