Mount volumes to all containers by defining it in a DevWorkspaceTemplate

[benoitf]

Description

Allow DevWorkspaceTemplate to notify the controller to mount a given volumePath to all containers

Additional context

use-case: As editors could run inside the user containers, there is a need to be able to execute the container from this volume.
But we can't require to have all devfiles adding a volume that they don't know about.

So I would know if I could use some annotations to notify that I want that a volume could be added in all containers.

Note

It would be fine to only mount the volume in the first available container or a container being annotated

[sleshchenko]

Investigation issue is created #656

[benoitf]

Also based on the feedback, it could be mounted just on a given container (like the first one having mountSources:true)
And like we can assign a main endpoint, we could assign a 'main' container as well.

[amisevsk]

Likely superceded by #656 -- please reopen if this is needed independently from the other issue.