Build, selftest, and package on macOS 27, Decide whether the macOS jobs run, Docs, harness, and compatibility +3

The GitHub App installation of this repository has not granted Actions: read, so GitHub keeps its job logs from GitCafe. An owner of the GitHub account can grant it in the installation's settings on GitHub (Settings, GitHub Apps, Configure), then retry. https://github.com/samanyudas/miri/runs/129698371150Request ID: 4395f8a2d5fcc06c8cf2f633f6c8d17cCopy