[FEATURE] Automate and document the release process

[dblock]

Is your feature request related to a problem?

Enable any maintainer to do a release by clicking a button.

What solution would you like?

Automation and documentation similar to https://github.com/opensearch-project/opensearch-java/blob/main/RELEASING.md#releasing.

Do you have any additional context?

Coming from #143. We want to release new features (more) often.

[wbeckler]

If once you create a tag you can see the release in the Go package manager, doesn't this already exist?

[VachaShah]

Closing this since the documentation is added.