E2E tests: Onboarding Step 4 - Complete your campaign

[ianlin]

Changes proposed in this Pull Request:

Closes part of #2070, this PR adds E2E tests for 📌 Onboarding Step 4 - Complete your campaign.

Detailed test instructions:

1. Follow these steps to set up the e2e env: https://github.com/woocommerce/google-listings-and-ads#e2e-testing
2. Run npm run test:e2e -- tests/e2e/specs/setup-mc/step-4-complete-campaign.test.js, the test should pass.
3. Or, run npm run test:e2e-dev -- tests/e2e/specs/setup-mc/step-4-complete-campaign.test.js, check the test in the chromium step by step.
4. Run npm run test:e2e to make sure all tests are passed.

Additional information

This PR added 2 extra commits to:

• fixed a failed test in onboarding step 1 in 8127446
• added a missing await for async actions in 2b0114c

Changelog entry

Dev - E2E - Onboarding Step 4 - Complete your campaign

[jorgemd24]

Thanks @ianlin, the E2E tests are covering a lot of cases, thanks for all the work!

I've also added a comment regarding one test that I believe takes too long to run. The other comments I've left are about minor issues.

[ianlin]

Thanks for reviewing @jorgemd24, I've addressed the comments you left and it's ready for anther round.

[jorgemd24]

@ianlin, LGTM! All tests are passing, and we've got a broad range of cases covered 👍