[Data] Change log level for ignored exceptions (ray-project#44408)

Ray Data gives you the option to ignore some number of errored blocks (for example, if you have some faulty data in your dataset). Currently, we log these exceptions as warnings. This PR updates the code to log the exceptions as errors.

Signed-off-by: Balaji Veeramani <[email protected]>

python/ray/data/_internal/execution/streaming_executor_state.py

@@ -436,7 +436,7 @@ def process_completed_tasks(
                                 " Ignoring this exception with remaining"
                                 f" max_errored_blocks={remaining}."
                             )
-                            logger.get_logger().warning(error_message, exc_info=e)
+                            logger.get_logger().error(error_message, exc_info=e)
                         else:
                             error_message += (
                                 " Dataset execution will now abort."