[ARFC] Optimism Create ETH E-Mode

[ChaosLabs]

As we recommended on a separate LST discussion and following our Chaos Labs LSD Methodology Update, we support this proposal to create an ETH-correlated E-Mode on Optimism

@ChaosLabs

In the short term and for the purpose of the upcoming vote, we support the current configuration of the emode categories across all networks and support the following:

1. Creating an ETH-correlated E-Mode on Optimism
2. Adding rETH to the E-Mode on Ethereum.
3. We do not recommend any immediate changes to the supply caps of the assets, as can be seen in our methodology post