Do not write empty *-container.json files #1483

What problem should this solve?

allure-junit-platform writes a container for every test, class and parameterized template, even when it has no fixtures (empty befores and afters). On a large suite that is thousands of empty files per run, and Allure TestOps has to ingest every one of them. Allure TestOps support suggested fixing it in the adapter.

What would you like to happen?

Do not write containers without befores and afters, or add an option for that. Containers with fixtures stay as they are.

Alternatives considered

allurectl --exclude-files drops non-empty containers too. Deleting empty ones in a ContainerLifecycleListener works, but every file is still written first.

Additional context

Minimal example (allure-jupiter 3.0.1, JUnit 5): allure-empty-containers-example.zip

gradle test writes 5 results and 8 containers. Only the container of the test with @BeforeEach has a fixture; the other 7 are empty:

{"uuid":"...","children":["..."],"befores":[],"afters":[]}