ci: replace scheduled jobs with scheduled pipelines

This is easier to manage from Circle CI UI and align with the version 14.2.x branch setup

See: https://circleci.com/docs/scheduled-pipelines/?utm_source=google&utm_medium=sem&utm_campaign=sem-google-dg--emea-en-dsa-maxConv-auth-nb&utm_term=g_-_c__dsa_&utm_content=&gclid=Cj0KCQiA1NebBhDDARIsAANiDD2Ja2WCBYtxifWx9d8uD2bEZzDjtO4mB2aq7fEtvoUKZZ8GeQbeNtgaAoW5EALw_wcB and https://app.circleci.com/settings/project/github/angular/angular-cli/triggers?return-to=https%3A%2F%2Fapp.circleci.com%2Fpipelines%2Fgithub%2Fangular%2Fangular-cli&triggerSource=&scheduledTriggerId=8e3e6898-fd55-41b1-a3e8-85c52981d941&success=true

.circleci/config.yml

@@ -324,6 +324,9 @@ jobs:
 workflows:
   version: 2
   default_workflow:
+    when:
+      not:
+        equal: [scheduled_pipeline, << pipeline.trigger_source >>]
     jobs:
       # Linux jobs
       - setup
@@ -392,16 +395,12 @@ workflows:
             - test
             - e2e-cli
 
-  nightly:
-    triggers:
-      - schedule:
-          cron: '0 0 * * *'
-          filters:
-            branches:
-              only:
-                - 13.3.x
+  daily_run_workflow:
+    when:
+      and:
+        - equal: [scheduled_pipeline, << pipeline.trigger_source >>]
+        - equal: ['13.3.x nightly run', << pipeline.schedule.name >>]
     jobs:
-      # Linux jobs
       - setup
       - build:
           requires: