prior to this fix Grafana didnt delete meta data about the provisioned dashboard in `dashboard_provisioning` which means that the dashboard wasn't inserted into Grafana again if the folder was delete within Grafana. closes #13280
prior to this fix Grafana didnt delete meta data about the provisioned dashboard in `dashboard_provisioning` which means that the dashboard wasn't inserted into Grafana again if the folder was delete within Grafana. closes #13280