Enable large .zarr downloads for web users.

[BrianWhitneyAI]

Web browser's permissions block streaming multiple file zips such as zarr files. This limitation means that we have to read files into memory completely before zipping. Additionally the memory limit of a single tab is restricted to ~2GB (have seen failures between 1.7 and 2.8 GB). This blocks us from downloading any zarr files larger than about 2GB. If we want to allow users to download large files from web we would need to create a backend service that could zip large files.

Tested on:

• Safari
• Chrome
• Firefox

[SeanLeRoy]

Closing this out for now until we hear from someone that they are encountering this limit. If you see this and want this done, re-open or create a new issue