[APINotes][BoundsSafety]

Support for adding bounds annotations using API notes was added downstream to github.com/swiftlang/llvm-project in https://github.com/swiftlang/llvm-project/commit/721e6a33e65fb78704e866ebca68a37793de5bfc. The fact that this addition to the API notes is only available downstream means that the `VERSION_MINOR` numbers have fallen out of sync between downstream and upstream. The feature was initially added downstream because upstream clang did not support `__counted_by` etc in function signatures, however we could still support parsing the API notes (to align the format) even though the semantic effect is not yet supported upstream.