refactor: removing the UseLocalBuild flag and updated scripts to run local docker build manually post deployment

[Harsh-Microsoft]

Purpose

This pull request introduces significant changes to simplify and improve the deployment process by removing the useLocalBuild parameter and implementing a more robust container registry and managed identity-based workflow. The changes span across multiple files, including Bicep templates, documentation, and deployment scripts. Below is a summary of the most important changes grouped by theme.

Removal of useLocalBuild Parameter:

• Removed the useLocalBuild parameter from multiple Bicep templates (infra/deploy_app_service.bicep, infra/deploy_backend_docker.bicep, infra/deploy_frontend_docker.bicep, infra/main.bicep) and associated logic for conditional ACR role assignments. [1] [2] [3] [4]
• Eliminated conditional resource definitions for container registry and role assignments based on useLocalBuild. [1] [2]

Enhanced Container Registry Configuration:

• Added new parameters (acrPullPrincipalIds, acrSku) to infra/deploy_container_registry.bicep to support role assignments and customizable ACR tier. [1] [2]

Improved Deployment Scripts:

• Refactored infra/scripts/docker-build.ps1 to dynamically fetch environment values using azd env get-values and removed reliance on useLocalBuild. Added steps to update web app settings and restart web apps after image deployment. [1] [2]

Documentation Updates:

• Removed references to USE_LOCAL_BUILD from documentation files (documents/CustomizingAzdParameters.md, documents/DeploymentGuide.md) and added instructions for publishing local build containers. [1] [2] [3]

Workflow Enhancements:

• Updated .github/workflows/test-automation.yml to use workflow_call for reusability, removing branch-specific triggers.

These changes collectively simplify the deployment process, improve maintainability, and enhance support for managed identities and container registry configurations.

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.

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