Refresh tutorial for Beats to Elasticsearch Service with Logstash as proxy to use Elastic Agent

[karenzone]

Ingest data from Beats to Elasticsearch Service with Logstash as a proxy

[karenzone]

@kilfoyle, I wanted to let you know that I opened this issue as you were instrumental in delivering the original tutorial.
We'll need to prioritize this against other work, but I wanted you to know this one is here.