MIP 84 - Optimizers Deprecation Phase 3

This is a proposal to proceed with optimizer deprecation by setting a target date for a full pause of new supply and borrow on the optimizers of December 20. On that date, take the following actions:

• Pause supply and borrow of remaining unpaused assets on the Aave v2 optimizer (WETH, USDC, and WBTC)
• Pause supply and borrow of remaining unpaused assets on the Aave v3 optimizer (wstETH collateral, supply/borrow of ETH)

This will prevent all new supply and borrow across all optimizers. Existing positions will not be impacted. After allowing time for suppliers and borrowers to close their positions, the DAO can consider final deprecation steps in a future proposal, such as adjusting parameters to encourage closing any remaining positions, and removing optimizer support from the frontend.