Update infrastructures manifest

[n-boshnakov]

How to categorize this PR?

/kind enhancement

What this PR does / why we need it:
This PR updates the infrastructure.yaml file in order to remove unnecessary content.

Which issue(s) this PR fixes:
Fixes #

Special notes for your reviewer:
To be merged after:

• Fix folder structure gardener-extension-provider-gcp#1332
• Fixed folder structure gardener-extension-provider-alicloud#877
• Updated folder structure gardener-extension-provider-azure#1454
• Update folder structure & fix trailing whitespace in "controller-serviceaccount.yaml" file name gardener-extension-provider-aws#1698

Summary by CodeRabbit

• Documentation
  • Streamlined provider documentation by removing outdated tutorial sections from multiple infrastructure providers.
  • Reorganized documentation structure to improve clarity and maintainability.

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[github-actions]

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📝 Walkthrough

Walkthrough

Documentation configuration file updated to remove tutorials subsections from four cloud provider infrastructure modules (AWS, GCP, Azure, Alicloud) and introduce a proposals file reference in the GCP provider configuration.

Changes

Cohort / File(s)	Summary
Documentation Configuration .docforge/documentation/gardener-extensions/infrastructure.yaml	Removed tutorials subsections from gardener-extension-provider-aws, gardener-extension-provider-gcp, gardener-extension-provider-azure, and gardener-extension-provider-alicloud. Added proposals/datadisk-image-restore.md file reference in GCP provider with inline note regarding minimal value contribution.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~12 minutes

Poem

🐰 The tutorials hop away, they've had their day,
While proposals take their place in the grand display.
Four providers bid farewell to lessons past,
As documentation gardens shift at last!
✨📚

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 inconclusive)

Check name	Status	Explanation	Resolution
Title check	❓ Inconclusive	The title 'Update infrastructures manifest' is vague and generic. While it refers to the infrastructures.yaml file being modified, it does not clearly specify what the actual change is (removing tutorials subsections from provider configurations).	Consider using a more specific title such as 'Remove tutorials subsections from provider infrastructure configs' or 'Clean up infrastructure manifest by removing tutorial entries' to better communicate the primary change.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Description check	✅ Passed	The PR description follows the required template structure with categorization, purpose explanation, and special notes included.

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✨ Finishing Touches

• 📝 Generate docstrings (stacked PR)
• 📝 Generate docstrings (commit on current branch)

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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