Allow ALTER ... ON CLUSTER Queries Regardless of Internal Replication Setting

Why it matters

Previously, ALTER ... ON CLUSTER queries were restricted based on the <internal_replication> setting in the cluster config, limiting their usability in some cluster setups. This feature removes that restriction, enabling broader and more flexible cluster schema modifications, improving cluster management and operational capabilities.

How to use it

Users can now run ALTER ... ON CLUSTER queries on their clusters without needing to adjust or rely on the <internal_replication> setting in the cluster configuration. Simply use the ALTER ... ON CLUSTER syntax as usual to apply schema changes across the cluster.