FIP-104: Reinforce PCV by consolidating assets and perform technical maintenance.

This FIP implements parts of the PCV reinforcement proposal that was approved in this snapshot: https://snapshot.fei.money/#/proposal/0x2fd5bdda0067098f6c0520fe309dfe90ca403758f0ce98c1854a00bf38999674 and discussed in this forum post: https://tribe.fei.money/t/fip-104-fei-pcv-reinforcement-proposal/4162?page=2

Specifically, it:

• Liquidates the protocol's DPI holdings to DAI using a Balancer LBP
• Transfers the protocol's CREAM holdings from the DAO timelock to the TribalCouncil multisig. The TribalCouncil will then liquidate the position on a DEX before returning the funds to PCV reserves

In addition, the FIP performs several technical maintenance tasks:

• Add and remove the relevant PCV deposits from the Collaterization Oracle
• Grant the TribalCouncil the role required to initiate the DPI LBP auction
• Add the uniswapPCVDeposit and dpiToDai LBP swapper as Safe addresses so PCV can be moved there
• Fix a bug in the NopeDAO configuration that previously set the voting period to 22 months rather than the expected 4 days
• Fund the TribalCouncil with 10 Eth
• Transfer 15,000 WETH from the DAO timelock to the aaveETHPCVDeposit
• Invert oracle price on LBP swapper and initiate auction