S3fs mount

[myntlabs]

[0.2.0]

• The objective of this release is to support mounting the Flint Metastore as a POSIX-like filesystem. Consequently, reducing the number of Docker volumes required by the Control Plane.
• The Experiment Tracker has been collapsed into the Experiment Server for simplicity and improved robustness around inotify events.
• The Experiment Server now stores metrics in the Flint Metastore via JuiceFS, which maintains a metadata database as a SQLite file inside the storage_meta mount.
• The Workspace now mounts the Flint Metastore to store workspace files such as notebooks.
• Worker Containers also now mount the Flint Metastore, giving them visibility of workspace files. This enables notebooks to be executed within a notebook.

P.s. need to design a PR template theat isn't just C+P from the changelog...