fix: Remove Deprecated HTTP Application Routing Add-on from Deployment Script

[Prasanjeet-Microsoft]

Purpose

• This change removes the usage of the deprecated http_application_routing add-on from the PowerShell deployment script used for provisioning AKS clusters. Microsoft no longer supports enabling this add-on for new clusters, and its presence causes runtime errors during the deployment process. The goal is to ensure smooth, error-free deployments by using only supported features.

Does this introduce a breaking change?

• Yes
• No

Golden Path Validation

• I have tested the primary workflows (the "golden path") to ensure they function correctly without errors.

Deployment Validation

• I have validated the deployment process successfully and all services are running as expected with this change.

What to Check

Verify that the following are valid:

• Confirm that AKS cluster deployment completes successfully without the earlier runtime error related to the deprecated add-on.
• Validate that the workloads are deployed correctly and accessible via the intended routing method (e.g., Ingress Controller or Azure Application Gateway).
• Ensure the rest of the script functions as expected and no dependent configurations are impacted by the removal.

[github-actions]

🎉 This PR is included in version 1.0.0 🎉

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