Drop the default secret name for gcs object storage
The default value was for already more appropriate for s3, as it was called 's3access'. But the use of a default was previously dropped for s3 to allow iam roles. This change also drops the default for gcs.
Depends on !166 (merged) being merged first
This is a breaking change, so it being considered for 1.0 #89 (closed)
closes #141
Edited by 🤖 GitLab Bot 🤖