[Enhancement][opensearch]add port 9600 (Performance Analyzer)

[toby181]

Is your feature request related to a problem? Please describe.
Exposing port 9600 (Performance Analyzer) is not possible via the opensearch chart, that needs to be done manually by modifying the statefulset and service.

Describe the solution you'd like
Port 9600, which is required for Performance Analyzer, needs to be exposed on the master(?) node and via the opensearch-cluster-master service.
Reference:
https://opensearch.org/docs/latest/opensearch/install/docker/#sample-docker-compose-file-for-development
https://opensearch.org/docs/latest/monitoring-plugins/pa/index/

Manual configuration:
StatefulSet 'opensearch-cluster-edu4-master':
spec.template.spec.containers.ports:
- containerPort: 9600
name: perf
protocol: TCP

Service 'opensearch-cluster-edu4-master':
spec.ports:

• name: perf
  port: 9600
  protocol: TCP
  targetPort: 9600

Additional context
I'm not sure whether the port needs to be exposed on the master nodes only or on all node types.

[prudhvigodithi]

Hey @toby181 I agree with you TCP 9600 metrics port should exposed.