Port self-install tutorials to current docs

[kilfoyle]

This ports two self-managed set-up tutorials into the 9.0+ docs:

• Tutorial 1: Installing a self-managed Elastic Stack
• Tutorial 2: Securing a self-managed Elastic Stack

(For reference, the 8.x versions are here and here.)

Generative AI disclosure

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

• Yes
• No

Used Claude 4.6 to port initial draft of tutorials

Closes: #5306

[github-actions]

Vale Linting Results

Summary: 12 warnings, 17 suggestions found

⚠️ Warnings (12)

File	Line	Rule	Message
deploy-manage/deploy/self-managed/tutorial-self-managed-install.md	126	Elastic.Spelling	'inet' is a possible misspelling.
deploy-manage/deploy/self-managed/tutorial-self-managed-install.md	292	Elastic.Spelling	'inet' is a possible misspelling.
deploy-manage/deploy/self-managed/tutorial-self-managed-install.md	440	Elastic.Spelling	'inet' is a possible misspelling.
deploy-manage/deploy/self-managed/tutorial-self-managed-install.md	448	Elastic.Spelling	'inet' is a possible misspelling.
deploy-manage/deploy/self-managed/tutorial-self-managed-install.md	525	Elastic.Spelling	'inet' is a possible misspelling.
deploy-manage/deploy/self-managed/tutorial-self-managed-install.md	535	Elastic.Spelling	'inet' is a possible misspelling.
deploy-manage/deploy/self-managed/tutorial-self-managed-install.md	659	Elastic.DontUse	Don't use 'just'.
deploy-manage/deploy/self-managed/tutorial-self-managed-secure.md	475	Elastic.Latinisms	Latin terms and abbreviations are a common source of confusion. Use 'for example' instead of 'e.g'.
deploy-manage/deploy/self-managed/tutorial-self-managed-secure.md	537	Elastic.Spelling	'ecnrypted' is a possible misspelling.
deploy-manage/deploy/self-managed/tutorial-self-managed-secure.md	589	Elastic.Spelling	'inet' is a possible misspelling.
deploy-manage/deploy/self-managed/tutorial-self-managed-secure.md	599	Elastic.Latinisms	Latin terms and abbreviations are a common source of confusion. Use 'for example' instead of 'e.g'.
deploy-manage/deploy/self-managed/tutorial-self-managed-secure.md	765	Elastic.DontUse	Don't use 'just'.

💡 Suggestions (17)

File	Line	Rule	Message
deploy-manage/deploy/self-managed/tutorial-self-managed-install.md	249	Elastic.Wordiness	Consider using 'because' instead of 'since'.
deploy-manage/deploy/self-managed/tutorial-self-managed-install.md	259	Elastic.Exclamation	Use exclamation points sparingly. Consider removing the exclamation point.
deploy-manage/deploy/self-managed/tutorial-self-managed-install.md	300	Elastic.Wordiness	Consider using 'because of' instead of 'as a result of'.
deploy-manage/deploy/self-managed/tutorial-self-managed-install.md	496	Elastic.Exclamation	Use exclamation points sparingly. Consider removing the exclamation point.
deploy-manage/deploy/self-managed/tutorial-self-managed-install.md	499	Elastic.Exclamation	Use exclamation points sparingly. Consider removing the exclamation point.
deploy-manage/deploy/self-managed/tutorial-self-managed-install.md	541	Elastic.Wordiness	Consider using 'because' instead of 'since'.
deploy-manage/deploy/self-managed/tutorial-self-managed-install.md	557	Elastic.Exclamation	Use exclamation points sparingly. Consider removing the exclamation point.
deploy-manage/deploy/self-managed/tutorial-self-managed-install.md	633	Elastic.Wordiness	Consider using 'all' instead of 'all of '.
deploy-manage/deploy/self-managed/tutorial-self-managed-install.md	649	Elastic.Exclamation	Use exclamation points sparingly. Consider removing the exclamation point.
deploy-manage/deploy/self-managed/tutorial-self-managed-install.md	659	Elastic.Exclamation	Use exclamation points sparingly. Consider removing the exclamation point.
deploy-manage/deploy/self-managed/tutorial-self-managed-secure.md	268	Elastic.WordChoice	Consider using 'can, might' instead of 'may', unless the term is in the UI.
deploy-manage/deploy/self-managed/tutorial-self-managed-secure.md	285	Elastic.Wordiness	Consider using 'because' instead of 'Since'.
deploy-manage/deploy/self-managed/tutorial-self-managed-secure.md	443	Elastic.WordChoice	Consider using 'can, might' instead of 'may', unless the term is in the UI.
deploy-manage/deploy/self-managed/tutorial-self-managed-secure.md	541	Elastic.Exclamation	Use exclamation points sparingly. Consider removing the exclamation point.
deploy-manage/deploy/self-managed/tutorial-self-managed-secure.md	741	Elastic.Wordiness	Consider using 'all' instead of 'all of '.
deploy-manage/deploy/self-managed/tutorial-self-managed-secure.md	757	Elastic.Exclamation	Use exclamation points sparingly. Consider removing the exclamation point.
deploy-manage/deploy/self-managed/tutorial-self-managed-secure.md	765	Elastic.Exclamation	Use exclamation points sparingly. Consider removing the exclamation point.

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[github-actions]

🔍 Preview links for changed docs

• deploy-manage/deploy/self-managed/tutorial-self-managed-install.md
• deploy-manage/deploy/self-managed/tutorial-self-managed-secure.md
• deploy-manage/deploy/self-managed/tutorials.md
• deploy-manage/deploy/self-managed.md