While Apex and Lightning Web Components tests are very much key tools for monitoring regressions in your application, the limitations and scope of the functionality such tests can cover is small by design, since they are unit tests, not integration tests. Thus, they are not particularly suited to performing large data volume or full end-to-end user interface testing.
The preceding pipeline configuration creates only one scratch org with a given configuration. You can, of course, create scratch orgs of different types to perform different kinds of testing. At the time of writing, the Scratch Org Template feature is in Pilot. This allows you to customize your scratch orgs to pre-install other packages, test configurations, and data. This is ideal for creating a suite of test org templates, for example.
Here are some considerations for implementing...