Add santametricservice and basic metrics to Santad.
This PR adds the santametricservice, and adds basic metrics to santad. It also updates the SNTMetricSet to have and updates packaging scripts to include the santametricservice (aka metric service) in the final bundle.
Co-authored-by: Russell Hancox <russellhancox@users.noreply.github.com>
Project: Convert to bazel, part 2
The main thing to call out in this PR is that Santa.app is now embedded inside santa-driver.kext along with everything else. The package will handle updating this automatically but it should be called out in release notes to make everyone aware.
* Switch to using macos_kernel_extension and macos_xpc_service, stop using product_type.
* Have Bazel embed all related binaries inside santa-driver.kext, including Santa.app. This simplifies the :release and :reload rules.
* Add commands for unload, load and reload, removing any need to keep the Rakefile around 😃
* Make the :kernel_tests rule a command that replicates what the Rakefile did for this.
* Added a project-wide .bazelrc that always generates dSYMs
Documentation changes to follow, as all the building instructions are now out of date.
