[AST matchers] matchers for absl Status / StatusOr#160953

fmayer wants to merge 2 commits intomainllvm/llvm-project:mainfrom

users/fmayer/spr/ast-matchers-matchers-for-absl-status-statusorllvm/llvm-project:users/fmayer/spr/ast-matchers-matchers-for-absl-status-statusorCopy head branch name to clipboard