Add GCS support for backups
In https://gitlab.com/charts/gitlab/issues/500 we added s3 compatible external object support to backups.
We should explore providing additional options, such as GCS support, in order to match the other components we are shipping that do already support it.
Alternatively, another options would be to switch from using s3cmd to using a rake task built into the rails product. This has the advantages of reducing the amount of config we would be required to provide, as we would be able to use the gitlab fog configuration for most of the objects. (We should evaluate this option while looking at solving https://gitlab.com/charts/gitlab/issues/646)
Edited by DJ Mountney