public job status of nomad metrics by default

[ColdWaterLW]

Is your feature request related to a problem?

no

Describe the solution you'd like

add the following config to nomad.hcl

telemetry {
  collection_interval = "1s"
  prometheus_metrics = true
  publish_allocation_metrics = true    #包括job状态
}

reference: https://www.nomadproject.io/docs/configuration/telemetry#prometheus_metrics