Deprecate GHES 3.1 (#28798)

* add 3.1 to deprecated versions

* rewrite img src to use azure blob storage in archive script

Co-authored-by: rachmari <rachmari@users.noreply.github.com>

* remove static files for ghes 3.1

* remove liquid conditionals and content for ghes 3.1

* remove outdated hardware reqs reusable

* Fix liquid conditional uncaught by script

* Close liquid conditionals missed by script

* Apply @mattpollard's suggestions

Co-authored-by: Matt Pollard <mattpollard@users.noreply.github.com>

Co-authored-by: rachmari <rachmari@users.noreply.github.com>
Co-authored-by: Matt Pollard <mattpollard@users.noreply.github.com>

content/copilot/index.md

@@ -22,13 +22,13 @@ featuredLinks:
     - /copilot/configuring-github-copilot/configuring-github-copilot-in-visual-studio
 layout: product-landing
 versions:
-  feature: 'copilot'
+  feature: copilot
 children:
   - /quickstart
   - /overview-of-github-copilot
   - /getting-started-with-github-copilot
   - /configuring-github-copilot
-topics: 
+topics:
   - Copilot
 ---