Remove NodeImplementation Generics from Network Types

[bfish713]

This PR does 2 things primarily.

1. Makes Membership something that is specified on NodeType. This means that we specify 1 Membership type for everything. Just because a Membership is the same type doesn't mean it describes the same thing. So we can still have a Quorum with 1000s of nodes and a committee of 10 nodes. What this describes is that anything describing membership uses the same types throughout the system. Currently this fits our model completely ,we use the same membership type for every Exchange right now (the type is GeneralStaticCommittee). When we implement Variable stake I can foresee us using just one type as well. If we do need to create a different Membership impl for DA, or VID, or something, I propose we simply add this type to NodeType. That change should be very simple to do after this PR.
2. Remove NodeImplementation generic parameters for a ton of stuff. We had been passing this all over the code, specifically the newtork stack (Messages, ConnectedNetworks, and CommunicationChannels) mostly just to pull out various Memberships Removing this was mostly a side effect of the first change.

Both of these changes will make removing the Exchanges traits much easier.

This depends on: #2071 so review that one first because this branch includes those changes as well.

For reviewing this I would focus on the changes to in node_implementation.rs, vote2.rs, and simple_vote.rs. Also note the remove of the generic parameters from various structs/traits. The rest is simply finding and removing the parameters everywhere.

The merge-base changed after approval.

The merge-base changed after approval.