[Docs] Create a guide for having filebeat write to logs-*-*

[mdbirnstiehl]

It would be nice to have a guide that shows Filebeat users how to have their logs written to logs-- instead of filebeat.

Helpful links:

https://www.elastic.co/guide/en/beats/filebeat/current/elasticsearch-output.html#index-option-es

Slack reference:
https://elastic.slack.com/archives/C04R6THHZFH/p1707768484993389

[bmorelli25]

Is this worth keeping in the backlog or should we close as won't do?

[mdbirnstiehl]

I think we can probably close at this point with the current limitations.