[libcxx-commits] [libcxx] [llvm] [libc++] Move some macOS CI jobs to Github actions (PR #89083)

[Oliver Stöneberg via libcxx-commits]

firewave wrote:

FYI the performance of `macos-*` runners can be quite erratic and they may be performing multitudes (up to 5x) worse on occasion - see https://github.com/danmar/cppcheck/pull/6704 for some context. I guess I also need to report this upstream.

https://github.com/llvm/llvm-project/pull/89083