[BIP-902] Enable Gauge For 25% Bal / 25% Aura / 50% wabasUSDC

Summary

PR with Payload https://github.com/BalancerMaxis/multisig-ops/pull/2612 Summary: > This is a proposal to enable the root gauge 0xa9390f0e0fd42d3a53a5ba8ed2a381ba29a2ed8e on Ethereum, \[which redirects rewards to the child gauge 0x894c4BE2949CD8193B1107a09102955a12d2F8dA on Base\] for the pool 0xdb373fd670c1767db9ac9f2512ccf3ef15fd9d3d (BAL / AURA / waBasUSDC). > This proposal seeks to onboard a 25% BAL / 25% AURA / 50% waBasUSDC pool on Balancer v3 (Base) with a 2% emissions cap....