Revert "Enable BigQuery tests for PR"

This reverts commit 4bb73ac.

Author: erindru

.circleci/continue_config.yml

@@ -327,16 +327,16 @@ workflows:
           matrix:
             parameters:
               engine:
-                #- snowflake
-                #- databricks
-                #- redshift
+                - snowflake
+                - databricks
+                - redshift
                 - bigquery
-                #- clickhouse-cloud
-                #- athena
-          #filters:
-          #  branches:
-          #    only:
-          #      - main
+                - clickhouse-cloud
+                - athena
+          filters:
+            branches:
+              only:
+                - main
       - trigger_private_tests:
           requires:
             - style_and_cicd_tests