Support reading data from cloud data storage

[choldgraf]

Summary

Across a few issues now we have run into questions about the right ways that users should try to access remote data from their hubs. A few that come to mind:

• Support reading datasets from Google Cloud Storage #280
• Document best-practices for IP address stability and accessing remote datasets docs#63

We should document some basic best practices in where to store / how to access data on the major cloud providers, so that people know where to start. To scope this a bit, let's assume the storage is Object Storage.

User Stories

• As a hub user, I want to access data that is in one of the major cloud providers (Azure/AWS/Google) that may be authenticated

Acceptance criteria

• Given a user that wishes to access data in a cloud provider, there's a documented practice for how to set up their data and authenticate themselves to access it.

Tasks to complete

• See what tutorials and guides other communities have written, consider linking to them
• Define the recommended best practices for accessing this data from a 2i2c hub
• Write out a draft PR for one or more cloud providers
• ...

[yuvipanda]

I think there's other more specific issues dealing with this now, and we do allow reading from various cloud datasets most of the time.