[Enhancement][OpenSearch & OpenSearch Dashboards] Enhance documentation for Ingress paramaters

[TheAlgo]

Is your feature request related to a problem? Please describe. It is related to documentation of ingress params

Describe the solution you'd like A clear and concise description with multiple examples so that it is easy for users to understand and impelement.

Describe alternatives you've considered N/A

Additional context Related conversation -> https://github.com/opensearch-project/helm-charts/pull/390#discussion_r1141036284

[prudhvigodithi]

[Triage] Thanks @TheAlgo, @jwitko can you please take a look at this from your merged PR to update the documentation. Thank you