[CI] Move cron trigger to dedicated nightly workflow for better CI behavior on forks (#937)

* Make nightly jobs change

* revert other changes

Author: pamelafox

.github/workflows/nightly-jobs.yaml

@@ -0,0 +1,10 @@
+name: Nightly Jobs
+
+on:
+  schedule:
+    - cron: '0 0 * * *'
+  workflow_dispatch:
+
+jobs:
+  python-test:
+    uses: ./.github/workflows/python-test.yaml

.github/workflows/python-test.yaml

@@ -5,8 +5,7 @@ on:
     branches: [ main ]
   pull_request:
     branches: [ main ]
-  schedule:
-    - cron: '0 0 * * *' # Run at midnight every day
+  workflow_call:
 
 jobs:
   test_package: