Support conda-lock files for efficient/reliable conda env creation

[rsignell-usgs]

It's great that Studio Lab finds and builds conda environments using the environment.yml file.

It would be great to also support conda-lock files, which have the advantage of 100% reliable reproducibility and speed, since the conda (or mamba) solver does not need to be invoked.

As an example repo that works with Studio Lab (and that has a conda-lock file), check out: https://github.com/Element84/geo-notebooks#launch-in-sagemaker-studio-lab

[MicheleMonclova]

Looking into this now. Thanks for the note.