ci: adding scheduled runs for system-tests (#315)

* ci: adding scheduled runs for system-tests

* test

* Fix dev call

* Remove test

* Remove API key

* Cleanup

Author: nccatoni

.github/workflows/dev.yml

@@ -200,8 +200,6 @@ jobs:
   system-tests:
     needs: build-system-tests-artifact
     uses: DataDog/system-tests/.github/workflows/system-tests.yml@main
-    secrets:
-      TEST_OPTIMIZATION_API_KEY: ${{ secrets.DD_CI_VIS_API_KEY }}
     permissions:
       contents: read
       id-token: write