Revert "Enable snowflake tests for PR"

This reverts commit bf30d26.

Author: erindru

.circleci/continue_config.yml

@@ -328,15 +328,15 @@ workflows:
             parameters:
               engine:
                 - snowflake
-                #- databricks
-                #- redshift
-                #- bigquery
-                #- clickhouse-cloud
-                #- athena
-          #filters:
-          #  branches:
-          #    only:
-          #      - main
+                - databricks
+                - redshift
+                - bigquery
+                - clickhouse-cloud
+                - athena
+          filters:
+            branches:
+              only:
+                - main
       - trigger_private_tests:
           requires:
             - style_and_cicd_tests