* PR Checks: use `macos-12` runners for CLI v. < 2.15.1
Prior to CLI v2.15.1, MacOS ARM runners were not supported by the build tracer. "macos-latest" is now an ARM runner, so we run these tests on the old CLIs on Intel runners instead.
* Log a warning if SIP is disabled and CLI is < 2.15.1
* Add changenote for SIP-disabled support on old CLI versions
* Set up Python 3.11 for all MacOS checks
* Run integration test PR checks nightly
Scheduled for 5AM UTC. This will assist in catching bugs introduced with new runner images.
* Specify generated YAML indentations
For consistency with our non-autogenerated files and GitHub documentation, we should further indent items in lists (`sequence`).
