Reapply "[clang] [ubsan] add __has_feature for UBSan checks" (#148322)#148323

fmayer merged 3 commits intomainllvm/llvm-project:mainfrom

users/fmayer/spr/reapply-clang-ubsan-add-__has_feature-for-ubsan-checks-148322llvm/llvm-project:users/fmayer/spr/reapply-clang-ubsan-add-__has_feature-for-ubsan-checks-148322Copy head branch name to clipboard