Update the Connect to a remote cluster page

[yetanothertw]

Summary

Fixes #3473
These changes update the purpose of the page from what used to be a self-managed guide to a landing page that instead links out to instructions for setting up remote clusters for different deployment types.

A preview of the updated page

Generative AI disclosure

1. Did you use a generative AI (GenAI) tool to assist in creating this contribution?

• Yes
• No

[github-actions]

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[github-actions]

🔍 Preview links for changed docs

• deploy-manage/tools/cross-cluster-replication/_connect_to_a_remote_cluster.md

[shainaraskas]

ultimately, I think that this ccr tutorial should just be one page, so this specific fix is not ideal in the long term. however, it fixes the root cause of the issue and is good enough for me.

some link syntax suggestions, and some suggestions on the remaining content scope. approving to unblock but you should edit a bit

[eedugon]

I think we should update the first paragraph of the connect_to_a_remote_cluster doc as mentioned in one of the threads.

The reason is to ensure the reader understands remote clusters is a separate feature (than CCR) and needs to be configured first, before being able to replicate indices, etc. The way the sentence looks now feels ambiguous.

[eedugon]

Looks much better! Small comment to ensure local & remote, source & destination do not cause misunderstandings :)