- configured sccache on buildkite windows machines
- final result is sent to phabricator from "summary.py" that waits for both builds to complete
- extracted "add_url_artifact" to a runnable script
- reorganized code and fixed some of TODOs
maybe we will later use same agents for everything but for now I don't
want to modify working build much. But I have updated deployment of
release agent to use correct docker image (there were renamed a while
ago) and pass tags and agent token via env variables.
Have not deployed new deployment for release yet.
