Revert "Enable cloud tests for PR"

This reverts commit bf231f7.

Author: erindru

.circleci/continue_config.yml

@@ -333,10 +333,10 @@ workflows:
                 - bigquery
                 - clickhouse-cloud
                 - athena
-          #filters:
-          #  branches:
-          #    only:
-          #      - main
+          filters:
+            branches:
+              only:
+                - main
       - trigger_private_tests:
           requires:
             - style_and_cicd_tests