Automatically mount public cloud storage at session startup

[olevski]

if I’m using public buckets, I don’t want to constantly be entering bucket stuff when I launch my session and I want users who just “start” a session in my project to get the data mounted (e.g. classes, demos, workshops)

This can probably be stored in the project's renku.ini file.

We need to come up with a structure of how to store this in the configuration file.

Whose responsibility is it to read the configuration? It is probably better for users of the API to read the project and already request for the buckets to be mounted in the call to the notebooks API.