[Cloud UI] [AutoOps for self-managed] Document how to add or edit cluster display name

[wajihaparvez]

Summary

Adds a section to the Connect your SM cluster to AutoOps page.

Closes: #4137
Rel: https://github.com/elastic/cloud-ui/issues/533

[github-actions]

✅ Vale Linting Results

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[github-actions]

🔍 Preview links for changed docs

• deploy-manage/monitor/autoops/cc-connect-self-managed-to-autoops.md

[yetanothertw]

LGTM, thank you! 🐈

[arnonst]

@wajihaparvez re: Add or edit cluster display name
The action will be to change the display name (AKA give cluster name an alias)
The cluster be default has a name (long string). So the title, description is to edit/give alias and not to 'ADD'

[wajihaparvez]

@arnonst Thanks! I see.
The UI action is to "Add" so I think we should stick to "Add cluster display name" for the title. But I've made some changes in the description to explain that a name already exists by default. I also took out to "Edit" action to avoid confusion, because I think it will be obvious if users look at the UI. Let me know what you think

[arnonst]

@wajihaparvez

1. Consider if we can mention that this is an alias name and this will not change cluster name.
2. The sentence "On the cluster details page, select Add in the Cluster display name field." The action is actually Edit and not Add

[wajihaparvez]

@arnonst sure, I've made the changes you suggested. However, the cloud UI issue shows both "Add" and "Edit" as possible actions. Can you please confirm if the instructions that I have now are correct?

[wajihaparvez]

@arnonst merging as is. Please let me know if this section needs more edits. I'm happy to make changes