Merge pull request #39681 from apache/cp-39675

[Cherrypick] fix iceberg CDC test - #39675

Author: Amar3tto

sdks/python/apache_beam/yaml/extended_tests/databases/iceberg.yaml

@@ -28,6 +28,9 @@ fixtures:
             - { id: 1, name: "label", required: true, type: "string" }
             - { id: 2, name: "rank", required: true, type: "long" }
           identifier-field-ids: [1]
+        # Required for ReadFromIcebergCDC (format version >= 2).
+        properties:
+          format-version: "2"
 
 pipelines:
   - name: write