Azure Kubernets docs

[happyRip]

Summary

Ref https://github.com/TheThingsIndustries/product-management/issues/8

Screenshots

Changes

• Split kubernetes section into azure and self-managed
• Add Azure Kubernetes docs

Notes for Reviewers

nil

Checklist

• Scope: The referenced issue is addressed, there are no unrelated changes.
• Run Locally: Verified that the docs build using make server, posted screenshots, verified external links. Test with HUGO_PARAMS_SEARCH_ENABLED=true if style changes will affect the search bar.
• New Features Marked: Documentation for new features is marked using the new-in-version shortcode, according to the guidelines in CONTRIBUTING.
• Style Guidelines: Documentation obeys style guidelines in CONTRIBUTING.
• Commits: Commit messages follow guidelines in CONTRIBUTING, there are no fixup commits left.

[nejraselimovic]

Please apply fixes (for example for TTS shortcode, title sizes, example values in code blocks) to all occurrences in all files

[KrishnaIyer]

Good start.

[KrishnaIyer]

Good improvements. Almost there!

[KrishnaIyer]

This is good now. Please fix the small items that have comments on them.