chore: use circleci timings split for e2e tests

Author: flotwig

circle.yml

@@ -425,7 +425,10 @@ commands:
     steps:
       - restore_cached_workspace
       - run:
-          command: yarn workspace @packages/server test ./test/e2e/$(( $CIRCLE_NODE_INDEX ))_*spec* --browser <<parameters.browser>>
+          command: |
+            SPECS=`circleci tests glob "/root/cypress/packages/server/test/e2e/*spec*" | circleci tests split --split-by=timings`
+            echo SPECS=$SPECS
+            yarn workspace @packages/server test $SPECS --browser <<parameters.browser>>
       - verify-mocha-results
       - store_test_results:
           path: /tmp/cypress