[llvm] [LLVM][rtsan] rtsan transform to preserve CFAnalyes (PR #102651)

[Chris Apple via llvm-commits]

cjappl wrote:

CC for review @nikic @fmayer 

Thanks for the help suggesting this (and explaining the implications)

rtsan co-author @davidtrevelyan 

https://github.com/llvm/llvm-project/pull/102651