[clang] [AST matchers] matchers for absl Status / StatusOr (PR #160953)

[Yitzhak Mandelbaum via cfe-commits]

================

----------------
ymand wrote:

I'd be interested in other clang member opinions as to whether this is the right location for these matchers. As much as they are general, their intended use/need is still the StatusOr model, so co-locating them with the model code might be more appropriate. I suspect AST matchers maintainers are not looking to add matcher support for a wide variety of (common?) library types.

https://github.com/llvm/llvm-project/pull/160953