* Brewfile for homebrew dependencies on macos
* Pull & build google-cloud-cpp/otel via bootstrap script rather than
keeping it all in the ext/ subfolder.
* Update controller CI build with new steps
Muuuuch easier to use external dependencies now
Also tried out conan and vcpkg. Ran into dependency issues when solving for packages to install with conan.
vcpkg is just obtuse as all hell to install and not easy to integrate