Add PartitionSpec to FileScanTask and handling in RecordBatchTransformer. This resolves ~50 tests in the spark-extensions Iceberg Java suite.

Author: mbutrovich

crates/iceberg/src/arrow/delete_filter.rs

@@ -339,6 +339,9 @@ pub(crate) mod tests {
                 project_field_ids: vec![],
                 predicate: None,
                 deletes: vec![pos_del_1, pos_del_2.clone()],
+                partition: None,
+                partition_spec_id: None,
+                partition_spec: None,
             },
             FileScanTask {
                 start: 0,
@@ -350,6 +353,9 @@ pub(crate) mod tests {
                 project_field_ids: vec![],
                 predicate: None,
                 deletes: vec![pos_del_3],
+                partition: None,
+                partition_spec_id: None,
+                partition_spec: None,
             },
         ];