Add missing configuration

[possani]

logical_backup_provider configuration was added in PR to support GCS. However, it missed the configmap which is still an option when deploying the operator.

Without it, the users will get the following error:

+ case $LOGICAL_BACKUP_PROVIDER in
/dump.sh: line 56: LOGICAL_BACKUP_PROVIDER: unbound variable 

[FxKu]

Thanks @possani for raising this. This new option as well as the GCS credentials path are indeed missing. I've created a separate PR (#1282) to cover everything. However, this is only about examples. Internally the operator default to s3 so I would expect it to set the LOGICAL_BACKUP_PROVIDER environment variable. Are you maybe using the new logical backup image with an older operator version?