there are a few integration tests for commands with both the v2 and v1 engine (e.g. list) -- it's not clear to me whether the v2 engine is the only engine now, or whether we just don't allow the ability to disable it by command line anymore. the integration tests (e.g.

tests/python/pants_test/engine/legacy/test_list_integration.py

) can't use that option in

1.5.0.dev0

and beyond to turn it on or off, so it's not clear to me what's required there