Playwright test changes

[aashwin-rvvup]

• Works with our existing test store and the test data setup on these stores (in the future we will be able to spin up test stacks with the data on demand)
• Update config to be a bit more reliable (remove parallelisation as it affects current test store rate limiting), update base url to be passed in as an env variable.

[valentin-rvvup]

Very happy with the changes. Great job 👏
Few suggestions for the docs.

1. Update the README.md to match the magento-plugin one

npm i
npx playwright install
...

2. In README.md, specify (1) the need to end domain on a trailing slash / and (2) to specify subdomain

# Point to your base url, including subdomain (www) and trailing slash (path/)
ENV TEST_BASE_URL=https://www.domain.com/path/ npx playwright test --ui

[valentin-rvvup]

👏 Works like a charm.

I would suggest updating the .env.sample to clarify how to obtain + set the Hyva SSH private key. Something like

# Use the private key matching one of the public keys on gitlab.hyva.io
HYVA_SSH_PRIVATE_KEY="Private key goes here"