Refactor how we store group_ids on conversations and agent_configurations

[flvndvd]

Today's group_ids on conversations and agent_configurations performs a conjunction on all group ids, this is too limiting as one space can have more than one group, we should perform disjunction between a space's groups.

To achieve this we need to update the way we store those to store a List of List of groupIds.

[Fraggle]

I don't understand the problem (and therefor, the solution).

[flvndvd]

The problem is that a space can have more than one group (we apply a disjunction/OR on the groups of a space). At the moment we only store a simple array of group ids on the agent_configurations and conversations on which we run a conjunction/AND. This does not work as a user is not expected to be in all space's group only one is enough.

We want to move towards a pattern that makes this easy to apply the same logic on agent_configurations and conversations.