[clang] [APINotes][BoundsSafety] Upstream API notes format for bounds-safety function parameters (PR #186960)

[Henrik G. Olsson via cfe-commits]

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

LGTM, but this is based on code I wrote, so it would be good if someone else could approve as well

https://github.com/llvm/llvm-project/pull/186960