DEV: Fix flaky specs (PR #13226)

Some specs failed when LOAD_PLUGINS=1 was set while migrating the test DB and the narrative-bot plugin disabled the send_welcome_message site setting.

The Onebox specs sometimes failed on GitHub Actions, but I wasn’t able to reproduce it locally. This should fix it.

GitHub

The Onebox specs sometimes failed on GitHub Actions, but I wasn’t able to reproduce it locally. This should fix it.

Is before/after doing anything differently than around? :thinking:

No, it should work the same, but I simply found the mixture of before and around confusing.