Add a missing RAILS_ENV=production to fix crontab clearing in the CI migration guide
All other commands in the guide set this env var, but it's missing for the whenever --clear-crontab call and this causes it to not clear the crontab properly.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
All other commands in the guide set this env var, but it's missing for the whenever --clear-crontab call and this causes it to not clear the crontab properly.