[clang] [[clang::always_destroy]] attribute silences warn-exit-time-destructor (PR #86486)

[Aaron Ballman via cfe-commits]

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

LGTM aside from a few minor nits, thank you for the improvement! I'm assuming you need me to land this on your behalf, so I'll go ahead and apply the fixes myself and then land the changes.

https://github.com/llvm/llvm-project/pull/86486