[BIP-927] Revoke Unused V2 Vault Permissions from Deprecated Relayers

Summary

TL;DR On all chains, revoke leftover permissions on the V2 vault for relayers that are deprecated or no longer used. Only the latest 20231031-batch-relayer-v6/BalancerRelayer is left intact. # Motivation The V2 vault still grants swap, batchSwap, joinPool, exitPool, manageUserBalance, and/or setRelayerApproval to several relayers that have been deprecated or are no longer in use. They are leftover from old frontend paths and third-party integrations. Revoking them is good...