BIP 89: Staked ETH and BTC interest

This vote adds weETH and wstETH tokens from base, arb and optimism for internal testing. To be in the future included into loans.

Since we added BTC collateral configuring the interest rate was overlooked and will be set to 2%

Even though HVH and sARCH is not eligible for loans this proposal whitelists those chains so that loans can be take to Archway or Havah. Minting bnUSD there.