LIP-22: stETH on L2 — wstETH on Optimism bridge endpoints upgrade

Currently, wstETH is deployed on various L2 networks. In addition to this, this is a proposal to make stETH available on L2 as well. By utilizing existing bridges and wrapping wstETH on L2, stETH can be used on L2 networks. Ensuring that stETH maintains the same utility on L2 as it does on L1 is crucial for user experience, and we support this proposal.