Function create_merged_partition 

pub async fn create_merged_partition(
    partitions_to_merge: Arc<PartitionCache>,
    partitions_all_views: Arc<PartitionCache>,
    lakehouse: Arc<LakehouseContext>,
    view: Arc<dyn View>,
    insert_range: TimeRange,
    logger: Arc<dyn Logger>,
) -> Result<(), Error>

Creates a merged partition from a set of existing partitions.