* feat(hardhat-ovm): allow ignoring libraries when compiling

https://github.com/ethereum-optimism/plugins/pull/39

* feat(batch-submitter): add logs

https://github.com/ethereum-optimism/batch-submitter/pull/75
https://github.com/ethereum-optimism/batch-submitter/pull/73

* chore: build contracts sequentially

this worsens our compilation times but ensures that the runs are not flaky