Allow us to generate reference screenshots on Checkly machines for Playwright Check Suites

For visual regression testing to work properly, the reference screenshot / golden file needs to be the same as screenshots taken during the test. Currently, there’s no way for users to generate reference screenshots in Checkly. They can upload their own reference images, but these often fail since Checkly’s machines will render the pages differently.

Browser checks solve this by enabling users to generate golden files within Checkly, via the UI or with npx checkly test --update-snapshots. It’d be very nice if Playwright check suites had a similar feature.