Azure: osx forward env vars set by conda-forge-ci-setup
Azure: osx forward env vars set by conda-forge-ci-setup

Forward some of the environment variables that are set by making use of the
fairly strange vso syntax as detailed in https://github.com/Microsoft/azure-pipelines-tasks/blob/master/docs/authoring/commands.md

conda-forge/conda-smithy,ocefpaf/conda-smithy,conda-forge/conda-smithy,ocefpaf/conda-smithy