[Enhancement][opensearch-dashboards] Add support for memory utilization in HorizontalPodAutoscaler

[Simple-Analysis]

Is your feature request related to a problem? Please describe.
Our Dashboards are fairly memory intensive, so we have had to modify the HPA created by the helm chart to support autoscaling based on memory utilization.

Describe the solution you'd like
This feature request would enable support for memory utilization as for HPA metrics.

[prudhvigodithi]

[Triage]
Hey @Simple-Analysis, yes can add the HPA to the dashboard https://kubernetes.io/docs/tasks/run-application/horizontal-pod-autoscale/, we can add a enablePodAutoscaling option in the values and update the templates with HPA, please let us know if you are interested in contributing to this :), example https://stackoverflow.com/a/70675287.
Thanks
@bbarani @TheAlgo @DandyDeveloper @peterzhuamazon @gaiksaya

[Simple-Analysis]

[Triage] Hey @Simple-Analysis, yes can add the HPA to the dashboard https://kubernetes.io/docs/tasks/run-application/horizontal-pod-autoscale/, we can add a enablePodAutoscaling option in the values and update the templates with HPA, please let us know if you are interested in contributing to this :), example https://stackoverflow.com/a/70675287.

I created a PR along with this issue.

#530

[prudhvigodithi]

Thanks @Simple-Analysis I will take a look at the PR.

[Simple-Analysis]

Closing since #530 has been merged