refs: https://github.com/TryGhost/DevOps/issues/78
Re-introduce parallel browser tests
These were adding in a previous PR, but the difference between local
running tests and using CI introduced failures.
Added additional fixes to ensure the Stripe API key is used in the CLI when running in CI.
refs: https://github.com/TryGhost/DevOps/issues/78
Instead of running a single instance of Ghost, we now run an instance of Ghost for each test worker.
This has the unfortunate effect that a test failing will close and restart a new instance of Ghost, but in general will be multiple times faster than sequential execution of tests.
refs TryGhost/Team#3122
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### <samp>🤖 Generated by Copilot at 87727d9</samp>
Added `data-testid` attributes to various elements in the announcement
bar settings feature to enable Playwright testing. Fixed a potential bug
with the `visibilitySettings` getter in the `visibility.js` component.
Added Playwright tests for the announcement bar settings feature in
`announcement-bar-settings.spec.js`.