Specifies how to treat concurrent executions of a Job.
Valid values are: - "Allow" (default): allows CronJobs to run concurrently; - "Forbid": forbids concurrent runs, skipping next run if previous run hasn't finished yet; - "Replace": cancels currently running job and replaces it with a new one
If not specified, this will rely on the time zone of the kube-controller-manager process.
ALPHA: This field is in alpha and must be enabled via the CronJobTimeZone feature gate.
CronJobSpec describes how the job execution will look like and when it will actually run.