[BIP-670] Update the Optimism Fees + LM Multisig to include Beethoven X signers

PR with Payload

https://github.com/BalancerMaxis/multisig-ops/pull/1224

Motivation:

Based on the partnership between Balancer and Beethoven X, the joint deployment on Optimism is managed by Beethoven X. Up to now, there was no formal agreement that grants Beethoven X the power to distribute liquidity mining incentives on behalf of Balancer. This BIP grants permission to Beethoven X to distribute incentives, such as grants, on the Optimism chain and therefore adding Beethoven X Contributors to the Balancer Optimism Fees + LM multisig. This grants Beethoven X the power to enact the responsibility to operate the Optimism deployment.

This proposal aims to update the multisig to a 3/6 multisig with 3 signers from Beethoven X and 3 signers from Balancer.

Specification:

Update the Optimism Fees + LM Multisig 0x09Df1626110803C7b3b07085Ef1E053494155089 to require three out of six confirmation with the following signers:

Zendragon: 0x7c2eA10D3e5922ba3bBBafa39Dc0677353D2AF17

Xeonus: 0x7019Be4E4eB74cA5F61224FeAf687d2b43998516

Tritium: 0xcf4fF1e03830D692F52EB094c52A5A6A2181Ab3F

Franz: 0x89c7D6ABA9Cd18D8A93571E583EEAc58Da75acE6

Ardo: 0x693f30c37D5a0Db9258C636E93Ccf011ACd8c90c

Netrim: 0xa01Bfd7F1Be1ccF81A02CF7D722c30bDCc029718