To decrease the feedback loop time for the gated extension job for core, we want to move GrowthExpriments to run in a separate job.
AC
- There's a CI job called quibble-with-GrowthExpriments-extensions-browser-tests-only-vendor-php83
- We can run this job manually
- The job is not triggered automatically yet
- The job passes
- If we intentionally break GrowthExperiment, the job fails