TIP-121c: veBAL OTC with Aave Companies

This proposal sets up the protocol to transfer 112k veBAL to Aave Companies for OTC trade.

Aave Companies will send 1,000,000 DAI to be escrowed on a 2/3 multisig with Aave Companies, Balancer DAO, and Tribe DAO (with eswak.eth as the designated representative).

In addition, the proposal moves 1M DAI from the FEI PSM to the escrow multisig to be sent to the TRIBE Redeemer.

After the Aave Companies team confirms they can properly use the veBAL-holding smart contracts, the 2/3 multisig will transfer 1M DAI to the TRIBE Redeemer, giving TRIBE holders access to the optimal amount of excess PCV for redemptions.

After the DAO Vote to disable governance, the final 1M DAI from Aave Companies would be sent back to the FEI PSM from the ⅔ Multisig.

Lastly, the proposal further cleans up unused roles in the system and performs maintenance on the collateralization oracle so that it is in the most up to date state.