Fix (or deprecate) 1password backend with new setup

[knelasevero]

Describe the solution you'd like
Operator SDK + Kubebuilder setup was upgraded in our project, together with the 1password version (from 0.5 to 1.7), but now 1password is having some problems to get secrets. We need to fix it. It just has to work like it worked before.

What is the added value?
1pass comes back to being a valid backend.

Observations (Constraints, Context, etc):

The main problem seems to be that there is a new OP_DEVICE env var that needs to be set for the cli to work.