[clang] Fix false negative when value initializing a field annotated with [[clang::require_field_initialization]] (PR #124329)

[Aaron Ballman via cfe-commits]

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

Sorry for the delayed review, this fell off my radar this week! :-/

Changes LGTM! The release branch did get cut, so this would need to be backported (https://releases.llvm.org/19.1.0/docs/GitHub.html#backporting-fixes-to-the-release-branches).

https://github.com/llvm/llvm-project/pull/124329