Dunk repo+conda func it in `utils.py`, consider explicit name

[charparr]

This might be a common enough use-case that we could dunk it in utils.py: clone the repo, set up conda - basically a full wrapper around setting up the execution environment. I'd also suggest a light rename of this function just for readability purposes because on first take it wasn't clear to me that this was doing anything with conda at all (when viewing through the Prefect UI and just seeing the flow name, and not the code). Perhaps clone_repo_and_install_conda_env?

Originally posted by @charparr in #83 (comment)