Improve readability of ReadRowsHelper debug log

Avoids logging full ReadRowsResponse protobuf, which may contain large serialized batches. Instead logs only the stream offset to aid in debugging without cluttering the logs.

Fixes #25409.

Author: Joy Haldar

plugin/trino-bigquery/src/main/java/io/trino/plugin/bigquery/ReadRowsHelper.java

@@ -85,7 +85,7 @@ public ReadRowsResponse next()
             do {
                 try {
                     ReadRowsResponse response = serverResponses.next();
-                    log.debug("ReadRowsResponse from BigQuery: %s", response);
+                    log.debug("ReadRowsResponse from BigQuery at offset: %s", nextOffset);
                     nextOffset += response.getRowCount();
                     return response;
                 }