Promote some step events to INFO
Summary:
Fixes https://github.com/dagster-io/dagster/issues/1666 by ensuring some structured logs are
printed to the console on a naive hello-world invocation
Test Plan: Unit, manual
Reviewers: #ft, schrockn
Reviewed By: #ft, schrockn
Subscribers: alangenfeld
Differential Revision: https://dagster.phacility.com/D815