GitLab scheduled pipeline: Don't notify owner

The owner of a scheduled CI/CD pipeline in GitLab will always be notified if the pipeline fails.

Follow these steps if you don't want this:

1. Create a Project Access Token with api scope and developer role
2. Create the scheduled pipeline with that token:

   curl --request POST --header "PRIVATE-TOKEN: ${TOKEN}" \
     --form description="Daily pipeline check" \
     --form ref="master" \
     --form cron="0 10 * * *" \
     --form cron_timezone="UTC" \
     --form active="true" \
     "https://${GITLAB_URL}/api/v4/projects/${PROJECT_ID}/pipeline_schedules"
   

3. Optional: Configure other notifications like Slack with Integrations