Remove nested pool operations from CLR, deploy v2

[jubeira]

We'll temporarily remove nested functionality from CLR to make an intermediate deployment.

Remove, generate build info, deploy, restore.

[jubeira]

Deployment is done. We can now restore nested ops.

[jubeira]

Let's restore nested ops.
This needs a lot of reviewing and there's room for potential simplifications.
We need to use the same pattern as with boosted pools: do not wrap / unwrap by default, but rather do it according to user inputs. We have token addresses as inputs in nested pools, so that should suffice to understand when to wrap / unwrap or when not to do it.