Feature Request: Surface an error/warn if the resource is a job

[tiffanny29631]

Checklist

• I did not find a related open enhancement request.
• I understand that enhancement requests filed in the GitHub repository are by default low priority.
• If this request is time-sensitive, I have submitted a corresponding issue with GCP support.

Describe the feature

Surface an error or warning if source includes Job.

https://docs.cloud.google.com/kubernetes-engine/config-sync/docs/concepts/gitops-best-practices#avoid-jobs

Importance

No response