databricks-cli/acceptance/bundle/variables/flag_overrides/script

# variable file
$CLI bundle validate -o json --var-file=vars.json | jq .resources.jobs.job1.job_clusters[0]

# variable flag
$CLI bundle validate -o json --var="cluster_key=mlops_stacks-cluster" | jq .resources.jobs.job1.job_clusters[0].job_cluster_key