Use tarball from compile task instead of git.get_project

A change made through evergreen.yml cleanup causes us to clone and set up the vm for each task (about 2 min to every single task in evergreen) which has increased the overall runtime. (git.get_project adds about 60 seconds to each task; we should not call it unless necessary.)

To decrease this overall runtime, we will tar up the workdir and the python venv dir and download them instead of git.get_project for all tasks that depend on compile.

The venv dir should go in /data/mci/{build_id} so every build has the same directory as the venv dir is not relocatable