GetDiskSizeGBFromReplicationSpec obtains the diskSizeGB value by looking into the electable spec of the first replication spec.

HashCodeString hashes a string to a unique hashcode.

Having the following considerations: - Existing replication specs can have the autoscaling values present in the state with default values even if not defined in the config (case when cluster is imported) - API expects autoScaling and analyticsAutoScaling aligned cross all region configs in the PATCH request This function is needed to avoid errors if a new replication spec is added, ensuring the PATCH request will have the auto scaling aligned with other replication specs when not present in config.