Added region on _oss_fs for testing sake

Author: helmiazizm

pyiceberg/io/pyarrow.py

@@ -408,6 +408,7 @@ def _initialize_oss_fs(self) -> FileSystem:
             "access_key": get_first_property_value(self.properties, S3_ACCESS_KEY_ID, AWS_ACCESS_KEY_ID),
             "secret_key": get_first_property_value(self.properties, S3_SECRET_ACCESS_KEY, AWS_SECRET_ACCESS_KEY),
             "session_token": get_first_property_value(self.properties, S3_SESSION_TOKEN, AWS_SESSION_TOKEN),
+            "region": get_first_property_value(self.properties, S3_REGION, AWS_REGION),
             "force_virtual_addressing": property_as_bool(self.properties, S3_FORCE_VIRTUAL_ADDRESSING, True),
         }