feat: add columnNameCharacterMap option to GCSToBigQueryOperator

Author: guan404ming

providers/google/src/airflow/providers/google/cloud/transfers/gcs_to_bigquery.py

@@ -547,6 +547,7 @@ def _create_external_table(self):
                 "quote",
                 "encoding",
                 "preserveAsciiControlCharacters",
+                "columnNameCharacterMap",
             ],
             "googleSheetsOptions": ["skipLeadingRows"],
         }
@@ -672,6 +673,7 @@ def _use_existing_table(self):
                 "quote",
                 "encoding",
                 "preserveAsciiControlCharacters",
+                "columnNameCharacterMap",
             ],
             "DATASTORE_BACKUP": ["projectionFields"],
             "NEWLINE_DELIMITED_JSON": ["autodetect", "ignoreUnknownValues"],