add ClusterFirstWithHostNet for kubeedge fluentbit

[Abirdcfly]

What this PR does / why we need it:

When we enable hostNetwork: true for the Fluent Bit edge pod, if ClusterFirstWithHostNet is not used, the <cloud-prometheus-service-host> service (like prometheus.default.svc) will not be reachable.

  prometheusRemoteWrite:
    host: <cloud-prometheus-service-host>
    port: <cloud-prometheus-service-port>
    uri: /api/v1/write
    addLabels : 
      app : fluentbit
      node: ${NODE_NAME}
      job : kubeedge

Which issue(s) this PR fixes:

Fixes #

Does this PR introduced a user-facing change?

None

Additional documentation, usage docs, etc.: