Expose preconditions to ACL methods #582
Description
The PATCH API requests for ACL in python-storage utilize storage.buckets.patch or storage.objects.patch, instead of ACL specific endpoints such as storage.bucket_acl.patch storage.object_acl.patch storage.default_object_acl.patch
- Add preconditions support to the ACL library methods to make the patch operations conditionally idempotent
- Add retry configuration
Note: IAM configurations storage.buckets.getIamPolicy storage.buckets.setIamPolicy are highly encouraged to control access instead