Allow defining a runtime_config
preset with the environment.
Both preset ID and slug should be supported.
Example (under step
configuration):
# with UUID
environment: g2.superduperlarge/f1bd21c8-ae31-451f-b75d-51cd0882aa1f
# with slug
environment: g2.superduperlarge/gpu-devices
# QOL: allow spaces for readability
environment: g2.superduperlarge / gpu-devices