Improve Function Mesh Labels

[nlu90]

Ref https://kubernetes.io/docs/concepts/overview/working-with-objects/common-labels/
And follow Pulsar-Operator label convention.
Notive line 23 and line 28

 16   labels:
 17     cloud.streamnative.io/location: us-east4
 18     cloud.streamnative.io/poolmember-name: us-east4
 19     cloud.streamnative.io/poolmember-namespace: streamnative
 20     cloud.streamnative.io/pulsar-cluster: logging
 21     cloud.streamnative.io/pulsar-instance: unifiedob
 22     cloud.streamnative.io/role: pulsar-function
 23     component: sink // <- add ?.functionmesh.io prefix
 24     controller-revision-hash: es-logs-with-ts-3e5094bd-sink-79b5875974
 25     name: es-logs-with-ts-3e5094bd
 26     namespace: sncloud
 27     pulsar-cluster: logging
 28     pulsar-component: es-logs-with-ts // <--- meaning not clear
 29     pulsar-namespace: sncloud-prod
 30     pulsar-tenant: uo
 31     statefulset.kubernetes.io/pod-name: es-logs-with-ts-3e5094bd-sink-7