retry test_big_query_legacy_sql (#31417)

* retry test_big_query_legacy_sql

* fix lint

* fixed lint

sdks/python/apache_beam/io/gcp/big_query_query_to_table_it_test.py

@@ -30,6 +30,8 @@
 
 import pytest
 from hamcrest.core.core.allof import all_of
+from tenacity import retry
+from tenacity import stop_after_attempt
 
 from apache_beam.io.gcp import big_query_query_to_table_pipeline
 from apache_beam.io.gcp.bigquery_tools import BigQueryWrapper
@@ -155,6 +157,7 @@ def _setup_new_types_env(self):
     self.assertTrue(passed, 'Error in BQ setup: %s' % errors)
 
   @pytest.mark.it_postcommit
+  @retry(reraise=True, stop=stop_after_attempt(3))
   def test_big_query_legacy_sql(self):
     verify_query = DIALECT_OUTPUT_VERIFY_QUERY % self.output_table
     expected_checksum = test_utils.compute_hash(DIALECT_OUTPUT_EXPECTED)