omgx stress test eth

[trangtran-enya]

Description
Add stress tests for ETH

• deposit
• withdraw

[petardenev]

adding do-not-merge label, until the stress tests are done to work properly with both integration and local environments.
Currently, there are a lot of issues with the code here:
`yarn test:integration:live
yarn run v1.22.10
$ IS_LIVE_NETWORK=true hardhat --network optimism-live test
stress tests
ETH stress tests
1) deposit ETH
WARNING: challenge period is greater than 60s (604800s), skipping test
2) withdraw ETH
0 passing (7m)
2 failing

1. stress tests
   ETH stress tests
   deposit ETH:
   Error: invalid BigNumber value (argument="value", value=undefined, code=INVALID_ARGUMENT, version=bignumber/5.4.0)
   at Logger.makeError (/home/pe60/Documents/enya-labs/optimism-aws-integration-dev/node_modules/@ethersproject/logger/src.ts/index.ts:213:28)
   at Logger.throwError (/home/pe60/Documents/enya-labs/optimism-aws-integration-dev/node_modules/@ethersproject/logger/src.ts/index.ts:225:20)
   at Logger.throwArgumentError (/home/pe60/Documents/enya-labs/optimism-aws-integration-dev/node_modules/@ethersproject/logger/src.ts/index.ts:229:21)
   at Function.BigNumber.from (/home/pe60/Documents/enya-labs/optimism-aws-integration-dev/node_modules/@ethersproject/bignumber/src.ts/bignumber.ts:291:23)
   at toBN (/home/pe60/Documents/enya-labs/optimism-aws-integration-dev/node_modules/@ethersproject/bignumber/src.ts/bignumber.ts:347:27)
   at BigNumber.mul (/home/pe60/Documents/enya-labs/optimism-aws-integration-dev/node_modules/@ethersproject/bignumber/src.ts/bignumber.ts:92:43)
   at Object.executeDepositETH (test/shared/stress-test-helpers.ts:154:57)
   at runMicrotasks ()
   at processTicksAndRejections (internal/process/task_queues.js:95:5)
   at Context. (test/stress-tests-eth.spec.ts:41:30)
2. stress tests
   ETH stress tests
   withdraw ETH:
   TypeError: testctx.skip is not a function
   at Object.useDynamicTimeoutForWithdrawals (test/shared/env.ts:208:13)
   at runMicrotasks ()
   at processTicksAndRejections (internal/process/task_queues.js:95:5)
   at Object.executeWithdrawETH (test/shared/stress-test-helpers.ts:126:5)
   at Context. (test/stress-tests-eth.spec.ts:73:19)
   error Command failed with exit code 2.
   info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.`

[CAPtheorem]

this fails the unit tests - please fix:

An unexpected error occurred:
Error: test/stress-tests-erc20.spec.ts(13,25): error TS2307: Cannot find module '../artifacts/contracts/ERC20.sol/ERC20.json' or its corresponding type declarations.
Error: test/stress-tests-erc20.spec.ts(14,25): error TS2307: Cannot find module '../artifacts-ovm/contracts/ERC20.sol/ERC20.json' or its corresponding type declarations.

[petardenev]

Please review https://github.com/omgnetwork/optimism/pull/220/checks?check_run_id=3220656367 as it seems the stress tests don't work properly when executed as part of the integration tests logic ran as part of the CI logic