Introduces local L1 and L2 integration tests

[eternauta1337]

General

• Deprecates npm run test:prod:ovm
• Deprecates local ovm CI tests
• Introduces a new type of "integration" tests that can be run granularly on top of multiple local setups

L2 local integration tests

Runs all tests under test/integration/l2, which test an L2 instance in isolation.

• Start the Optimism ops tool as described here: https://github.com/ethereum-optimism/optimism#integration-tests (checkout master)
• Compile the artifacts / contracts, run npx hardhat test:integration:l2 --compile
• The first time, run npx hardhat test:integration:l2 --deploy
• After that, while contracts do not change, the --deploy flag can be avoided.

L1 local integration tests

Idem L2 local integration tests, but targeting an isolated L1 instance.

Dual local integration tests

As before, but deploys both L1 and L2 instances and connects them. These tests mainly targets the bridges.

[codecov]

Codecov Report

Merging #1274 (19f8b22) into develop (8ae2404) will not change coverage.
The diff coverage is n/a.

❗ Current head 19f8b22 differs from pull request most recent head 8e740cd. Consider uploading reports for the commit 8e740cd to get more accurate results

@@           Coverage Diff            @@
##           develop    #1274   +/-   ##
========================================
  Coverage    95.53%   95.53%           
========================================
  Files           81       81           
  Lines         5582     5582           
  Branches       677      677           
========================================
  Hits          5333     5333           
  Misses         249      249           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 8ae2404...8e740cd. Read the comment docs.

[jacko125]

lgtm