Add macos build
This merge-request adds a new macOS build named macos_xcode13
, this was possible after successfully overhauling the dragnipur machine (macOS 12.4). This build only builds for serial back-end. We could possibly extend this in the future. It uses distributed ccache.
Notes:
- It uses an internally installed ccache binary, in the future we would like to download a parametrized version of ccache in each build job.
- It uses an internally installed ninja binary, in the future we would like to download a parametrized version of ninja in each build job.
Edited by Vicente Bolea