[1/2] Configure celeryless deploy on helm
Summary:
If celery is disabled in helm values, we default to using the K8RunLauncher. Resolves https://github.com/dagster-io/dagster/issues/2611.
Added docs:
Test Plan: bk, push_to_k8s
Reviewers: nate, catherinewu, johann, sashank
Reviewed By: catherinewu
Differential Revision: https://dagster.phacility.com/D4718