Refactor DVC to use external storage

[rmclanton]

When external storage is available, set up this repository to use it. This will mean may mean adding a new remote. The data stored in data and data/dvc_storage may be moved to a dvc data repository and removed from this repository.

[rmclanton]

When the external storage is set up enable the CI workflow again. As the data is too big to be moved through github without external storage or paying for git-lfs, it will always fail checks as it can't pull the data.