Disallow component trees with `component_version: active`

wim leers → credited larowlan → .

wim leers → credited mglaman → .

@larowlan and I are the two people who worked on versioned config entities. He confirmed this should be removed already, so given the test-only CI job failed as expected, the fix is trivial … pragmatically going ahead and merging 😇

This does not need backporting, because this only affected content exported using https://drupal.org/project/default_content.