WIP: Continuation of @0xcacti 's feat/crv3 branch to account for crv4 changes

[tb-team-dev-2]

Notes:

• I made third_party/bittensor-drand a git submodule so that it's more robust to changes. Right now, the git submodule points to my own fork at https://github.com/tb-team-dev-2/bittensor-drand but this should prob be changed to a subtrahend-labs/bittensor-drand fork that would just sync whenever opentensor/bittensor-drand is changed. This can be done with: git submodule set-url third_party/bittensor-drand https://github.com/subtrahend-labs/bittensor-drand. If the git submodule is not wanted, I can always remove it and then we could just manually copy whenever there are changes to opentensor/bittensor-drand
• The bindings.h file just needed a small update in the generate commit function to handle an extra hotkey arg, then tests started passing
• On first pull, you will need to run git submodule update --init --recursive to setup the git submodule

Todo:

• fix merge conflicts with master
• docs for setup (build with cargo build --release --no-default-features)
• use commit_timelocked_weightsextrinsic instead of commit_crv3_weights extrinsic
• make sure logic matches: Add new CRv4 logic opentensor/bittensor#2999

[0ximjosh]

This is great! To avoid merge conflicts i think it might be best to just manually pull over the code to a new branch based on main since there is only a few hundred lines changed.

LMK if you want to tackle that, as id love to get your name in the contributors list. Once its in a new branch based off latest main ill take a look and we can get this merged!