Audit previous alpha features that were released without official docs support

[gkulin]

[gkulin]

Alpha features mentioned in 2024 blog posts:

• [x] Support for Helm and Kustomize for AKS service target (azure-dev#3196)
• [x] Alpha support for Windows Arm64 (azure-dev#3968)
• [ ] Alpha support for persistent session affinity and domains for Azure Container Apps (ACA) (azure-dev#3955)
• [x] Alpha feature: Deployment stacks (azure-dev#4144)

[kristenwomack]

Audit is complete, opened an issue to document persistent session affinity alpha support here.