fix: add FPC to allowlist (#5464)

Fix for test failing on master. One of my prior PRs that added
validation went in and this test needed to updated to work with those
changes :)

yarn-project/end-to-end/src/benchmarks/bench_tx_size_fees.test.ts

@@ -6,6 +6,7 @@ import {
   PrivateFeePaymentMethod,
   PublicFeePaymentMethod,
   TxStatus,
+  getContractClassFromArtifact,
 } from '@aztec/aztec.js';
 import { FPCContract, GasTokenContract, TokenContract } from '@aztec/noir-contracts.js';
 import { getCanonicalGasTokenAddress } from '@aztec/protocol-contracts/gas-token';
@@ -34,6 +35,7 @@ describe('benchmarks/tx_size_fees', () => {
 
     await ctx.aztecNode.setConfig({
       feeRecipient: sequencerAddress,
+      allowedFeePaymentContractClasses: [getContractClassFromArtifact(FPCContract.artifact).id],
     });
 
     await publicDeployAccounts(aliceWallet, ctx.accounts);