[BIP-898] Migrate mainnet ALCX/ETH 80/20 gauge and Core Pool status to new v3 pool

## PR with Palyoad https://github.com/BalancerMaxis/multisig-ops/pull/2598 **Summary:** Through this proposal the gauge and the Core Pool status of the [old ALCX/ETH 80/20 v2](https://balancer.fi/pools/ethereum/v2/0xf16aee6a71af1a9bc8f56975a4c2705ca7a782bc0002000000000000000004bb) pool will be migrated to the [new ALCX/ETH 80/20 v3 pool](https://balancer.fi/pools/ethereum/v3/0x1535D7CA00323Aa32BD62AEDdf7ca651e4b95966). New pool deployed...