Create a setup script for the integration tests

integration-tests/test/basic-l1-l2-communication.spec.ts

-import { expect } from 'chai'
+import { expect } from './shared/setup'
 
 /* Imports: External */
 import { Contract, ContractFactory } from 'ethers'

integration-tests/test/bridged-tokens.ts

+import { expect } from './shared/setup'
+
 import { BigNumber, Contract, ContractFactory, utils, Wallet } from 'ethers'
 import { ethers } from 'hardhat'
 import * as L2Artifact from '@eth-optimism/contracts/artifacts/contracts/standards/L2StandardERC20.sol/L2StandardERC20.json'
-import { expect } from 'chai'
 
 import { OptimismEnv } from './shared/env'
 import { isLiveNetwork, isMainnet } from './shared/utils'

integration-tests/test/contracts.spec.ts

+import { expect } from './shared/setup'
+
 import { BigNumber, Contract, ContractFactory, utils, Wallet } from 'ethers'
 import { ethers } from 'hardhat'
-import { solidity } from 'ethereum-waffle'
-import chai, { expect } from 'chai'
 import { UniswapV3Deployer } from 'uniswap-v3-deploy-plugin/dist/deployer/UniswapV3Deployer'
 
 import { OptimismEnv } from './shared/env'
@@ -10,8 +10,6 @@ import { FeeAmount, TICK_SPACINGS } from '@uniswap/v3-sdk'
 import { abi as NFTABI } from '@uniswap/v3-periphery/artifacts/contracts/NonfungiblePositionManager.sol/NonfungiblePositionManager.json'
 import { abi as RouterABI } from '@uniswap/v3-periphery/artifacts/contracts/SwapRouter.sol/SwapRouter.json'
 
-chai.use(solidity)
-
 // Below methods taken from the Uniswap test suite, see
 // https://github.com/Uniswap/v3-periphery/blob/main/test/shared/ticks.ts
 const getMinTick = (tickSpacing: number) =>

integration-tests/test/fee-payment.spec.ts

-import chai, { expect } from 'chai'
-import chaiAsPromised from 'chai-as-promised'
-chai.use(chaiAsPromised)
+import { expect } from './shared/setup'
 
 /* Imports: External */
 import { BigNumber, utils } from 'ethers'

integration-tests/test/native-eth-ovm-calls.spec.ts

+import { expect } from './shared/setup'
+
 import { BigNumber, Contract, ContractFactory, Wallet } from 'ethers'
 import { ethers } from 'hardhat'
-import chai, { expect } from 'chai'
 import {
   fundUser,
   encodeSolidityRevertMessage,
   gasPriceForL2,
 } from './shared/utils'
 import { OptimismEnv } from './shared/env'
-import { solidity } from 'ethereum-waffle'
-
-chai.use(solidity)
 
 describe('Native ETH value integration tests', () => {
   let env: OptimismEnv

integration-tests/test/native-eth.spec.ts

-import { expect } from 'chai'
+import { expect } from './shared/setup'
 
 /* Imports: External */
 import { Wallet, utils, BigNumber } from 'ethers'

integration-tests/test/ovmcontext.spec.ts

-import { expect } from 'chai'
+import { expect } from './shared/setup'
 
 /* Imports: External */
 import { ethers } from 'hardhat'

integration-tests/test/predeploys.spec.ts

-import chai, { expect } from 'chai'
-import { solidity } from 'ethereum-waffle'
-chai.use(solidity)
+import { expect } from './shared/setup'
 
 /* Imports: Internal */
 import { ethers } from 'ethers'

integration-tests/test/queue-ingestion.spec.ts

-import { expect } from 'chai'
+import { expect } from './shared/setup'
 
 /* Imports: Internal */
 import { providers } from 'ethers'

integration-tests/test/replica.spec.ts

+import { expect } from './shared/setup'
 import { OptimismEnv } from './shared/env'
 import {
   defaultTransactionFactory,
@@ -5,7 +6,6 @@ import {
   sleep,
   isLiveNetwork,
 } from './shared/utils'
-import { expect } from 'chai'
 import { TransactionReceipt } from '@ethersproject/abstract-provider'
 
 describe('Replica Tests', () => {

integration-tests/test/rpc.spec.ts

+import { expect } from './shared/setup'
+
 import { expectApprox, injectL2Context } from '@eth-optimism/core-utils'
 import { Wallet, BigNumber, Contract, ContractFactory } from 'ethers'
 import { serialize } from '@ethersproject/transactions'
 import { ethers } from 'hardhat'
-import chai, { expect } from 'chai'
 import {
   sleep,
   l2Provider,
@@ -12,18 +13,13 @@ import {
   isLiveNetwork,
   gasPriceForL2,
 } from './shared/utils'
-import chaiAsPromised from 'chai-as-promised'
 import { OptimismEnv } from './shared/env'
 import {
   TransactionReceipt,
   TransactionRequest,
 } from '@ethersproject/providers'
-import { solidity } from 'ethereum-waffle'
 import simpleStorageJson from '../artifacts/contracts/SimpleStorage.sol/SimpleStorage.json'
 
-chai.use(chaiAsPromised)
-chai.use(solidity)
-
 describe('Basic RPC tests', () => {
   let env: OptimismEnv
   let wallet: Wallet

integration-tests/test/shared/setup.ts

+/* External Imports */
+import chai = require('chai')
+import chaiAsPromised from 'chai-as-promised'
+import { solidity } from 'ethereum-waffle'
+
+chai.use(solidity)
+chai.use(chaiAsPromised)
+const expect = chai.expect
+
+export { expect }

integration-tests/test/stress-tests.spec.ts

-import { expect } from 'chai'
+import { expect } from './shared/setup'
 
 /* Imports: External */
 import { Contract, ContractFactory, Wallet, utils } from 'ethers'

integration-tests/test/whitelist.spec.ts

+import { expect } from './shared/setup'
+
 /* Imports: External */
 import { ContractFactory } from 'ethers'
 import { ethers } from 'hardhat'
-import chai, { expect } from 'chai'
-import { solidity } from 'ethereum-waffle'
 import { predeploys } from '@eth-optimism/contracts'
 
 /* Imports: Internal */
 import { OptimismEnv } from './shared/env'
 import { l2Provider } from './shared/utils'
 
-chai.use(solidity)
-
 describe('Whitelist', async () => {
   const initialAmount = 1000
   const tokenName = 'OVM Test'